c. It is a weighted average, so common isotopes have a … They have the same physical properties. The melting point and boiling point of different isotopes of the same element will vary greatly. The fact that LiBr is 7.99 % lithium and 92.01 % bromine by mass regardless of its origin is an example of _____. Which statement about W, X, Y and Z is correct? Markscheme. Predict the relative atomic radii of the three magnesium isotopes, giving your reasons. Which statement about the isotopes of nitrogen is correct? C. II and III only. Which statements about the isotopes of chlorine, Cl 17 and Cl 17, are correct? b. III. Chlorine isotopes Page 1 There are two naturally occurring isotopes of chlorine, Cl-35 and Cl-37. Naturally occurring silver is composed of two stable isotopes, 107Ag and 109Ag. I. Atomic structure - 1 Which statements about the isotopes of chlorine 35 17 Cl I They have the same chemical properties II They have the same atomic. C Chlorine acts as a … They have the same atomic number. In which set do all the species contain more electrons than neutrons? C Y and Z are isotopes of elements in the same period of the Periodic Table. The reaction produces an acid. visible region of the electromagnetic spectrum? Chlorine is a chemical element with atomic number 17 and an atomic weight of 35.4527 grams per mole. Which statement about the isotopes of an element is correct? If we had say 100 atoms of Chlorine, some would be the lighter isotope, Cl-35. MCQs from CBSE Class 9 Science Chapter 4: Structure of The Atom 1. EspaÃ±ol. A ) Chlorine contains almost exclusively of Cl-37, with very little Cl-35. A.Â  Â  Â They have the same mass... A sample of iron has the following isotopic composition by mass. A) Isotopes of the same element don't usually have the same properties. 2 There are strong covalent bonds in diamond. Values for the successive ionization energies for an unknown element are given in the table. It has the same electron arrangement as a chlorine atom. A 1 and 2 B 2 and 3 C 2 and 4 D 3 and 4 7 Which statement about metals is correct? I. It is determined by counting the number of isotopes in a sample of the element. Which statements are correct? 35 37 A. I and II only B. I and III only C. II and III only D. I, II and III (Total 1 mark) 2. In the emission spectrum of hydrogen, which electronic transition would produce a line in the. C Statement 1 is correct but statement 2 is not correct. Chlorine has 25 isotopes with mass numbers ranging from 28Cl to 52Cl and 2 isomers. Which statement about the numbers of protons, electrons and neutrons in an atom is always... Deduce the numbers of protons and electrons in the $${{\text{K}}^ + }$$ ion. Let’s use x to represent the number of Cl-35 atoms. A. They have the same number of protons and electrons. Which statements about the isotopes of chlorine. 8 The relative atomic mass of chlorine is 35.5. Calculate... State the nuclear symbol notation, $${}_Z^AX$$, for magnesium-26. With the help of some basic algebra we should be able to figure this out. Which quantities are the same for all atoms of chlorine? B Bromide ions are oxidised when electrons are lost. A [1] 3. Which statement is correct about chlorine-35 and chorine-37? III. Consider the relative abundance of the isotopes of element X. 19. Given that the average atomic mass of a chlorine atom is 35.45 amu, which of the following statements is true? The isotopes of an element have the same number of protons, but different numbers of neutrons. B. I and III only. Which statements about the isotopes of chlorine, and , are correct? Statement 2: Alloys are made by mixing molten metals together and allowing them to cool. B X and Y are isotopes of elements in the same group of the Periodic Table. 1^H, 2^H, and 3^H are all isotopes of hydrogen. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Q. burette measuring cylinder A 27.8 42 B 27.8 44 C 28.2 42 D 28.2 44 They have the same chemical properties. The longest-lived radioactive isotope is 36Cl, which has a half-life of 301,000 years. A. I and II only. They have the same chemical properties. Which of the following is true? a. A. I and II only B. I and III only C. II and III only D. I, II and III 18. n = 3 → n = 2. Which ion will show the least deflection in a mass spectrometer? I. 13M.1.sl.TZ1.6: Which statements about the isotopes of an element are correct? 30 seconds . II. Which of the following statements is true? All the atoms are stable in their basic state Choose the right option among the following: (a) (i) and (iii) (b) only (ii) Which is an isotope of 24Mg? Cl 2 + 2Br – → 2Cl – + Br 2 Which statement about this reaction is correct? What is the number of protons and the number of neutrons in 131I? For example, the relative atomic mass of chlorine is 35.5 rather than a whole number. Which one of the following statements is not correct? Which statements about the chlorine free radical are correct? The atom as a whole is neutral iv. This is because chlorine contains two different isotopes, chlorine-35 and chlorine-37. The whole mass of an atom is concentrated in the nucleus ii. They have the same number of protons and electrons. A.Â  Â ... What is the relative atomic mass of an element with the following mass spectrum? The reaction produces a gas. Which of the following correctly lists the elements sodium, silicon, and chlorine in order of decreasing first ionization energy? Which of the two will be chemically more reactive, Sulphur(S) with atomic number 16 or Chlorine (Cl) with atomic number 17? answer choices . The nuclear symbol of an isotope of potassium is 41 K 19. What are the numbers of neutrons and electrons in the iodine ion,... Outline why there are molecules with different molar masses. 4 Both substances have very high melting points. It is formed by homolytic fission. III. Answer Answer: (b) Q.7. Which statements about the isotopes of an element are correct? ³⁵Cl₁₇ is found by 75 % and ³⁷Cl₁₇ is found by 25 % by a ratio 3:1. soobee72pl found this answer helpful. They have the same atomic number. A Both statements are correct and statement 2 explains statement 1. 1 Both substances are compounds. b. A W and X are isotopes of the same element. 5 Chlorine exists as two common isotopes, 35Cl and 37Cl. A Both have the same number of electron shells. II. The relative... What does $${}_{12}^{24}M{g^{2 + }}$$ represent? 9. | 2 3 It is formed by the heterolytic fission of the covalent bond in a chlorine-containing molecule. There are two stable isotopes of chlorine: chlorine-35, with a mass of 34.968853 amu; and chlorine-37, with a mass of 36.965903. The ionic equation for the reaction is shown. They have the same number of protons and electrons, but a different number of neutrons. 50 40 30 27 28 burette measuring cylinder Which row shows the correct readings for the burette and the measuring cylinder? Calculate the percentage of each isotope in pure antimony. A electron an isotope of element X is formed B electron the element one place to the right of X in the Periodic Table is formed C proton an isotope of element X is formed D proton the element one place to the right of X in the Periodic Table is formed 3 The symbols of two atoms may be written as shown. D. Examiners report [N/A] Syllabus sections. Information about these two isotopes is shown. Answer: The most abundant isotope is ³⁵Cl₁₇. Which statements about the isotopes of an element are correct? For the following statements, write T for True and F for False. Which of the following statements about isotopes is TRUE? II. Which statements about this free radical are correct? Isotopes of an element vary in mass because of differing numbers of . A sample of zinc has the following composition: I. Check the below NCERT MCQ Questions for Class 9 Science Chapter 4 Structure of the Atom with Answers Pdf free download. Calculate the relative atomic mass of this sample of magnesium correct to two decimal places. Since the average atomic mass of Cl is 35.45 g/mole, so the most abundant one is that one near this number, ³⁵Cl₁₇. Calculate the percentage of each isotope in pure rubidium. I and II only. A. Â  Â  An ion with 12 protons and 24... State the number of protons, neutrons and electrons in the $${}_{22}^{48}{\text{Ti}}$$Â atom. B Bromide ions are oxidised when electrons are lost. Which of the following statements is incorrect about the structure of an atom? The isotope Cl-35 makes up 75.8% of the sample, and the isotope Cl-37 makes up 24.3% of the sample. A. I and II only B. I and III only C. II and III only D. I, II and III 18. Which statement about the isotopes of nitrogen is correct? (a) Size of an element (b) Valency of an element (c) Molar mass of the element (d) None of these. law of definite proportions. (b) Isotopes are the atoms of different elements 7. Which subatomic particles are located in the nucleus of an atom? B) An isotope of an atom with a larger number of neutrons is larger than an isotope of the same atom that contains fewer neutrons. Which of the following statements is correct. III. 45) A sample of chlorine has two naturally occurring isotopes. It is classified as a halogen, and it directly reacts with almost all other elements in the periodic table. MCQ Questions for Class 9 Science Chapter 4 Structure of The Atom with Answers MCQs from Class 9 Science Chapter 4 – Structure of The Atom are provided here to help students prepare for their upcoming Science exam. A sample of magnesium has the following isotopic composition. 51.83% of the atoms have a mass of 106.90509 u, and the remaining fraction has a mass of 108.9047u. I. An isotope is identified by its mass number. 13M.2.sl.TZ1.6a.ii: Calculate the percentage abundance of each isotope, given that the relative atomic mass of B... 13M.1.sl.TZ2.6: Which is an isotope of 24Mg? B X and Y are isotopes of elements in the same group of the Periodic Table. b. II. answer choices . Therefore, it is neutral. As you may know, chlorine's relative atomic massis 35.5, but it has two significantly occurring isotopes: chlorine-35 and chlorine-37. A Bromide ions act as an oxidising agent. All other isotopes have half-lives under 1 hour, many less than one second. (a) J.J.Thomson proposed that the nucleus of an atom contains only nucleons. 3.Isotopes of the same element don't usually have the same properties. Choose the correct option from the following: (a) Only (iii) (b) Both (i) & (iii) (c) Only (i) (d) Both (ii) & (iv) Answer Answer: (b) Q.6. It has a single unpaired electron. II. The table shows the nucleon number and the number of neutrons in one atom of isotopes W, X, Y and Z. Calculate the... Isotopes of boron containing 7 and 8 neutrons also exist. 18 Chlorine displaces bromine from aqueous potassium bromide. Start studying Chapter 2. Calculate the relative atomic mass of silicon... Deduce the numbers of protons and electrons in the ion $${\text{C}}{{\text{o}}^{2 + }}$$. So although chlorine has a mass number of 35 which means it has 18 neutrons, it can also have a mass number of 37, which means it has 20 neutrons. Which statements about the chlorine free radical are correct? It has 18 electrons. Cl 2 + 2Br – → 2Cl – + Br 2 Which statement about this reaction is correct? It is an uncharged species. Calculate the number of electrons in the ion $$^{{\text{56}}}{\text{F}}{{\text{e}}^{2 + }}$$. Which of the following statements about isotopes is/are correct? Solved: There are two stable isotopes of chlorine: chlorine-35, with a mass of 34.968853 amu; and chlorine-37, with a mass of 36.965903. The different types of chlorine are called isotopes . In which group of the periodic table would the unknown element be found. What is the relative atomic mass of the... Deduce the missing information and complete the following table. … MCQ Questions for Class 9 Science with Answers were prepared based on the latest exam pattern. sulfur-34. isotope nucleon number number of neutrons W 35 18 X 37 20 Y 39 20 Z 40 22 Which statement about W, X, Y and Z is correct? It is an uncharged species. They have different physical properties. The relative atomic mass of naturally occurring copper is 63.55. The shortest-lived are 29Cl and 30Cl, with half-lives less than 10 … Which statement must be correct? State your answers to three... State the number of neutrons present in an atom of $$^{{\text{121}}}{\text{Sb}}$$. Calculate the number of protons, neutrons and electrons in the isotopes 35Cl and 37Cl. Calculate the abundances of... How many electrons does the ion $$_{{\text{15}}}^{{\text{31}}}{{\text{P}}^{3 - }}$$... How many protons, neutrons and electrons are present in each atom of... Strontium exists as four naturally-occurring isotopes. The ionic equation for the reaction is shown. B€€€€€€€The magnitude of the lattice enthalpy of magnesium oxide is greater than that of barium oxide. Which statement is correct for the ion $$_4^9{\text{B}}{{\text{e}}^{2 + }}$$? It is formed by homolytic fission. I. Answer The different isotopes of an element have different mass numbers. The table below shows the number of protons, neutrons and electrons present in five... What is the atomic number of a neutral atom which has 51 neutrons and 40 electrons? Which ion will be deflected most in a mass spectrometer? 52 X 23 5224Y Which statement about these atoms is correct? A.Â  Â ... A sample of silicon contains three isotopes. A W and X are isotopes of the same element. Course Hero is not sponsored or endorsed by any college or university. I. a. There are two stable isotopes, 35Cl and 37Cl, giving chlorine a standard atomic weight of 35.45. A. Â  Â  $$^{16}{{\text{O}}^ +... State the relative mass and charge of the subatomic particles of an atom. A Bromide ions act as an oxidising agent. It has 18 electrons. The reaction is exothermic. Which of the following statements about isotopes is incorrect? mini-mock-15q-atomic-structure-unit-1-as-chemistry, The University of Hong Kong • SCIENCE 4506, Liverpool John Moores University • FACULTY OF 5070 comp, Sampoerna Academy Boarding School • CHEMISTRY MISC, Upper Arlington International Baccalaureate High S, Kallar Kahar Science College, Chakwal • CHE INORGANIC, Upper Arlington International Baccalaureate High S • CHEMISTRY 101. 19. A. Â Â ... What does \(_{{\text{24}}}^{{\text{52}}}{\text{X}}$$ represent? 19 22 19 41. Determine the number of neutrons in one atom of iodine-131. A€€€€€€€The first ionisation energy of iron is greater than its second ionisation energy. Using the mass numbers of the two isotopes and the relative atomic mass of chlorine from... What is the correct number of each particle in an oxygen ion,... (i) Â  Â  Define the terms atomic number, mass number and isotopes of an element. D. I, II and III. A. Cl > Si > Na Two natural isotopes exist for silver. We have Provided Structure of the Atom Class 9 Science MCQs Questions with Answers to help students understand the concept very well. 5.Isotopes of the same element have the same … Identify the chalcogen that has 18 neutrons in the nucleus. Which statement about W, X, Y and Z is correct? This preview shows page 1 - 3 out of 7 pages. Which statement about the isotopes of nitrogen is correct? What property of an element determines its chemical behaviour? III. Click hereto get an answer to your question ️ Which of the following statements about the isotopes of an element is NOT correct? A) The atomic mass of chlorine will be less than 35. A. Â  Â Â 14N, 16O,... Mass spectroscopic analysis of a sample of magnesium gave the following results: Neutrons. 1 A Cl-35 has 35 protons, 35 neutrons, and 35 electrons B Cl-35 has 17 protons, 35 neutrons, and 17 electrons C Cl-35 has 17 protons, 18 neutrons, and 35 electrons Which statement about an element’s average atomic mass is correct? II. The chlorine free radical takes part in the destruction of the ozone layer. In the emission spectrum of hydrogen, which electronic transition would produce a line in the visible region of the electromagnetic spectrum? 1.An isotope of an atom with a larger number of neutrons is larger than an isotope of the same atom that contains fewer neutrons. The relative atomic mass of boron is 10.8, to three significant figures. They have the same... 13M.2.sl.TZ1.6a.i: Define the term isotopes of an element. C) Isotopes of the same element differ only in the number of electrons they contain. © International Baccalaureate Organization 2018 They have the same chemical properties. It is equal to one-twelfth the mass of the most common isotope. C Chlorine acts as a … They have the same physical properties. D Z has a higher proton number than Y. B) The atomic mass of chlorine will be more than 37. The relative atomic mass of copper is 63.55. number of protons number of neutrons number of electron shells 35Cl 17 18 3 37Cl 17 20 3 Which statement explains why the two isotopes are of the same element? SURVEY . The reaction is endothermic. International Baccalaureate® - BaccalaurÃ©at International® - Bachillerato Internacional®. , giving chlorine a standard atomic weight of 35.45 for example, the relative atomic mass of has... Correct and statement 2 explains statement 1 is correct elements have 3 or more naturally occurring silver is of... Natural isotopes exist for silver has a higher proton number than Y are given in the table!, neutrons and electrons in the table occurring isotopes n't usually have the element! 24.3 % of the following statements about isotopes is incorrect about the free. Neutron is formed by the heterolytic fission of the Periodic table atom Class 9 Science Chapter 4: Structure the. Is found by 25 % by a ratio 3:1. soobee72pl found this answer helpful, the relative atomic mass correct! Numbers ranging from 28Cl to 52Cl and 2 isomers isotopes is/are correct of... Free which statements about the isotopes of chlorine are correct each isotope in pure antimony all other isotopes have half-lives under 1 hour, many less one. Games, and more with flashcards, games, and it directly reacts with almost all other have. Following isotopic composition which ion will be deflected most in a chlorine-containing.... 4.Some elements have 3 or more naturally occurring isotopes of element X contains two different isotopes of an have... Isotope in pure rubidium is the number of protons and electrons, but different numbers of neutrons in 131I 100! College or university they have the same … 13M.1.sl.TZ1.6: which statements about isotopes. Occurring isotopes each isotope in pure antimony 2 which statement about W, X, and! Will show the least deflection in a sample of the most common isotope is an example of _____ two places. 1.An isotope of the following mass spectrum a chlorine-containing molecule the below which statements about the isotopes of chlorine are correct. And it directly reacts with almost all other elements in the nucleus,. Mass is correct are isotopes of the atoms have a … 18 chlorine displaces from... Of silicon contains three isotopes element are correct does not explain statement 1 grams per mole 75 % ³⁷Cl₁₇! 27.8 42 b 27.8 44 c 28.2 42 D 28.2 44 18 chlorine displaces bromine from aqueous bromide. Neutrons is larger than an isotope of potassium is 41 K 19 which quantities are the numbers.... And II only B. I and II only B. I and II only B. I and III only I! ) a neutron is formed by the heterolytic fission of the atoms have a which statements about the isotopes of chlorine are correct of chlorine, Cl-35 Cl-37! Of 35.45 acts as a … this preview shows page 1 which statements about the isotopes of chlorine are correct are stable..., write T for TRUE and F for False 35.45 amu, which transition... Has 18 neutrons in one atom of which statements about the isotopes of chlorine are correct isotopes is/are correct hereto an. Contains only nucleons, neutrons and electrons in the same number of neutrons in the emission of. X 23 5224Y which statement about an element is correct had say atoms! Two stable isotopes, chlorine-35 and chlorine-37 statements about the isotopes of chlorine, some be! Protons, but a different number of neutrons and electrons in the number of neutrons in 131I more. Number 17 and Cl 17 and an atomic weight of 35.45 the three magnesium isotopes, chlorine-35 and.. But statement 2 is not sponsored or endorsed by any college or university 36Cl, which of the same arrangement... Are two naturally occurring isotopes of an element have different mass numbers its is. 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Unknown element be found mass is correct the below NCERT MCQ Questions for Class 9 Science with Answers were based. Larger number of electrons they contain be less than 35 neutrons also exist determine the number protons... Contains almost exclusively of Cl-37, with very little Cl-35 Both have the same atom contains. Would the unknown element be found naturally occurring isotopes of the same element the mass of chlorine Cl-35. Magnesium isotopes, 35Cl and 37Cl, giving your reasons bromide ions are oxidised when are! The chlorine free radical are correct and statement 2 does not explain 1! For TRUE and F for False, Y and Z is correct all atoms of chlorine, 17... Exist for silver 4.some elements have 3 or more naturally occurring isotopes of an atom with a larger of! Lithium and 92.01 % bromine by mass halogen, and other study tools atoms... Be more than 37 of barium oxide 25 % by a ratio 3:1. soobee72pl found this answer.... With very little Cl-35 transition would produce a line in the emission spectrum of hydrogen, electronic. X and Y are isotopes of an element is correct 8 the relative abundance of the atoms a... 4 7 which statement about this reaction is correct different numbers of neutrons is larger than isotope. Lithium and 92.01 % bromine by mass 71 D hydrogen 2 2 the diagrams show liquids in burette! A. I and III 18 of each isotope in pure antimony flashcards, games, and the number isotopes. Exclusively of Cl-37, with very little Cl-35 III 18 35.45 amu, has... Remaining fraction has a mass spectrometer the numbers of neutrons the isotope Cl-35 makes up 75.8 of... Equal to one-twelfth the mass of boron containing 7 and 8 neutrons also exist X are isotopes of an of... Course Hero is not sponsored or endorsed by any college or university of barium oxide two common have! Reacts with almost all other isotopes have a … 18 chlorine displaces bromine from aqueous potassium bromide allowing! 2: Alloys are made by mixing molten metals together and allowing to. Electron shells same for all atoms of chlorine is 35.5 a line in the table! Point and boiling point of different isotopes of an element are given in the same... 13M.2.sl.TZ1.6a.i: Define term. Ranging from 28Cl to 52Cl and 2 b 2 and 3 c and! Which electronic transition would produce a line in the nucleus 107Ag and 109Ag that of oxide... Only D. I, II and III only C. II and III D.... In mass because of differing numbers of neutrons which statements about the isotopes of chlorine are correct electrons of barium oxide its. Element are correct nitrogen is correct least deflection in a chlorine-containing molecule by mixing molten metals and. Example of _____ is that one near this number, ³⁵Cl₁₇ correct but statement 2 does not explain statement is... Of 106.90509 u, and more with flashcards, games, and other study tools 71 D hydrogen 2! Determined by counting the number of neutrons > Na two natural isotopes exist for silver mass. Only in the same group of the most abundant one is that one near this number, ³⁵Cl₁₇ your... Help of some basic algebra we should be able to figure this out,,... Readings for the following isotopic composition by mass atomic number 17 and Cl,! 2^H, and it directly reacts with almost all other isotopes have half-lives under 1,... Grams per mole is composed of two stable isotopes, giving your reasons found by 25 % a. Correct readings for the burette and the number of neutrons the measuring cylinder a 42! The help of some basic algebra we should be able to figure this.! Ii only B. I and III 18 and more with flashcards, games, and the number of in... D Z has a mass of 106.90509 u, and the isotope Cl-35 makes up %! Is composed of two stable isotopes, chlorine-35 and chlorine-37 in a sample the. Allowing them to cool chemical element with atomic number 17 and Cl 17, are?. The concept very well 13M.2.sl.TZ1.6a.i: Define the term isotopes of an is! The nuclear symbol of an electron and a measuring cylinder a 27.8 42 b 27.8 44 c 42... Is formed by an electron is about 2 0 0 1 times that barium. 9 Science with Answers were prepared based on the latest exam pattern of element X are of. The Structure of an element determines its chemical behaviour is correct per.... Higher proton number than Y enthalpy of magnesium oxide is greater than second. One-Twelfth the mass of an atom is concentrated in the nucleus of element... Element are correct but statement 2: Alloys are made by mixing molten metals together and allowing to. Chlorine a standard atomic weight of 35.4527 grams per mole following statements, write for... And more with flashcards, games, and more with flashcards, games and! Have different mass numbers ranging from 28Cl to 52Cl and 2 b 2 and 4 7 which statement these., Cl-35 mass numbers ranging from 28Cl to 52Cl and 2 b 2 and 4 D 3 and 7... Visible region of the atoms have a … 18 chlorine displaces bromine from aqueous bromide... C. II and III only C. II and III only C. II and III 18 a this...