[1] It can be accomplished abiotically, as a result of industrial processes. which statement about nuclear fusion is correct? A nitrogen atom has 7 protons, and its most common isotope has 7 neutrons. It can be accomplished abiotically, as a result of lightning. B Ammonia is a compound. Which statements about water are correct? For example, carbon-12 is an isotope of carbon with a mass number of 12. What happens to the electrons when lithium atoms and nitrogen atoms form ions? B) 1 and 2 only are correct. The table shows the nucleon number and the number of neutrons in one atom of isotopes W, X, Y and Z. Which statement is CORRECT about isotopes?----a. c. the fusion reaction lasts for several hundred years. what is the emperical formula . B) The nitrogen atom has a mass number of approximately 14 daltons and an atomic mass of 7. Which of the following statements is correct about the atoms in ammonia (NH3)? e. Isotopes occurs where two atoms of the same element vary in the number of protons they contain oftentimes, there are extra neutrons in a nucleus than protons. Which of the following diagrams would represent the … Which statements are correct? Which of the following is a correct statement concerning nitrogen? c. The most abundant carbon isotope is 13-carbon . Its nucleus has a relative charge of 27+. B) The nitrogen atom has a mass number of approximately 14 daltons and an atomic mass of 7. A Air is a mixture. For this reason, we can say that both oxygen and nitrogen are composed of protons, neutrons and electrons. Which statement about nitrogen fixation is false? a) Nitrogen balance is the ratio of intake of nitrogenous compounds / output of nitrogenous metabolites from the body b) In nitrogen equilibrium the excretion of nitrogenous metabolites is greater than the dietary intake of … Which of the following statements concerning the two isotopes 146C and 147N is/are correct? Which one of following statements about nitrogen balance is correct? The isotope cobalt-60 (2 Co ) is used to destroy cancer cells in the human body. B X and Y are isotopes of elements in the same group of the Periodic Table. A W and X are isotopes of the same element. A compound is found to contain 15.12 % phosphorus, 6.841 % nitrogen, and 78.03 % bromine by weight. Diamond was used for the drill tip as it does not conduct electricity. Each isotope of an element is a pure substance. Magnesium is a group 2 metal which exists as a number of isotopes and forms many compounds. Ions of two isotopes of iron are 53Fe2+ €€€€€€€€€€€€€ 56Fe2+ Which statement is correct? If all the statements are true, choose answer E. The carbon isotope has more neutrons per atom than the nitrogen isotope. Which of the following statements about hydrogen are correct ? b. helium nuclei can fuse to form elements such as nitrogen. 1, 2 and 3 only. d. It can be accomplished biologically, by algae. B) The nitrogen atom has a strong positive charge; each hydrogen atom has a strong positive charge. 3. Electrons absorb energy as they move from low to high energy levels. A)electrons and protons B)electrons and positrons C)neutrons and protons D)neutrons and electrons 3.Which subatomic particles are found in the nucleus of an atom of beryllium? Every chemical element has one or more isotopes. 4H to 7H are nuclei isotopes that are incorporated in the laboratory. An oxygen molecule is an oxygen atom and a nitrogen molecule is a nitrogen atom. Isotopes of a given element have the same number of protons but different numbers of neutrons in each atom. Nitrogen is in Group V of the Periodic Table. Which statements about an atom of cobalt-60 are correct? Which statement about W, X, Y and Z is correct? A)An electron and a proton both have a charge of +1. Both isotopes contain 14 nucleons per atom. 2 A radioactive isotope of carbon has more nucleons than the non-radioactive isotope, 12C 6. 4) A) 39 Ar B) 80 Br C) 36 C l- D) 40 A r+ E) 34 S 2 - 5) Which one of the following does not occur as diatomic molecules in elemental form? 2. A) Each hydrogen atom has a partial positive charge; the nitrogen atom has a partial negative charge. No: The mass number is the sum of the number of protons and neutrons, but the atomic number is just the number of protons. They are variants of a particular chemical element which differ in neutron number, and consequently in nucleon number The correct answer is C. Some isotopes are unstable and decay. Check the below NCERT MCQ Questions for Class 9 Science Chapter 4 Structure of the Atom with Answers Pdf free download. For this reason, the letter B is the correct alternative. 2.Which statement describes the structure of an atom? All of the others have half-lives below 7.15 seconds, with most of these being below 620 milliseconds. A) nitrogen B) calcium C) iodine D) sodium E) phosphorus Answer: C Topic: Concept 2.1 Skill: Knowledge/Comprehension 3) Three or four of the following statements are true and correct. Answer verified by Toppr (b) Hydrogen never acts as cation in ionic salts. 1 Which statement is not correct? 7 The table shows the nucleon number and the number of neutrons in one atom of isotopes W, X, Y and Z. nitrogen, potassium, calcium. One of the least stable isotopes of hydrogen is 7H and the most stable isotope is 5H. The nucleus of a nitrogen atom contains 7 neutrons and 7 protons. A. d. 13-carbon isotope is radioactive . chemistry. Isotope, one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly identical chemical behaviour but with different atomic masses and physical properties. Fourteen radioisotopes are also known, with atomic masses ranging from 10 to 25, along with one nuclear isomer, N. All of these radioisotopes are short-lived, the longest-lived being nitrogen-13 with a half-life of 9.965 minutes. How many protons, neutrons and electrons could there be in this radioactive isotope of carbon? (iv) Dihydrogen does not act as a reducing agent. a. two hydrogen electrons become protons during fusion. 1. protons neutrons electrons We have Provided Structure of the Atom Class 9 Science MCQs Questions with Answers to help students understand the concept very well. The chemical properties of isotopes are similar but their physical properties are different. All elements have more than one natural isotope ==> b. 5) A) hydrogen B) bromine C) oxygen D) sulfur E) nitrogen 6) Which pair of elements is most apt to form an ionic compound with each other? Which of the following statements about isotopes is incorrect? These isotopes are in common use to date. d. large nuclei break apart to form smaller nuclei. what is the emperical formula The different isotopes of an element have different mass numbers. Which two atoms are isotopes?. Which of the following is a correct statement concerning nitrogen? answer choices . Both isotopes have the same chemical properties. 2 3 It contains 33 neutrons. 1, 3 and 4 only. (ii) Hydrogen never acts as cation in ionic salts. 1 They are atoms which have the same chemical properties because they have the same number of electrons in their outer shell. 1, 2, 3 and 4. cyanobacteria. Natural nitrogen (7N) consists of two stable isotopes: the vast majority (99.6%) of naturally occurring nitrogen is nitrogen-14, with the remainder being nitrogen-15. An isotope is named after the element and the mass number of its atoms. So this statement is only true for protium - i.e. It has a different number of neutrons from the atoms of other isotopes of cobalt. (iii) Hydrogen ion, , exists freely in solution. Which of the following is a correct statement concerning nitrogen? Deduce the number of nitrogen atoms in: 5.00 x 10^-3 mol of ammonia, NH3 and 4.601 g of nitrogen dioxide, NO2 chemistry A compound is found to contain 15.12 % phosphorus, 6.841 % nitrogen, and 78.03 % bromine by weight. Carbon has three naturally occurring isotopes . Which one, if any, is false? Byjus Asked on June 11, 2016 in Chemistry. A sample of DNA containing only one isotope of nitrogen, 15N, was incubated with nucleotides containing only the 14N isotope along with the enzymes needed for replication. Lithium reacts with nitrogen to form the ionic compound lithium nitride. C) 2 and 3 only are correct answer choices . The nucleus of a nitrogen atom contains 7 neutrons and 7 protons. Most of the isotopes with at… (B) The nitrogen atom has a mass number of approximately 14 daltons and an atomic mass of 7. B. W and Z. C. X and Z. D. X and Y (Total 1 mark) 18. 6) A) calcium, sodium Which of the following is a correct statement concerning nitrogen? An atom is first identified and labeled according to the number of protons in its nucleus. use of the Data Bôoklêtis relevant to this the most common isotope of hydrogen 1H - which has no neutrons. D Sea water is a compound. 4 Which statements about isotopes of the same element are correct? A. W and Y. Hydrogen has three isotopes of which protium (1 1 H) is the most common. ... nitrogen, phosphorus, potassium. Answer. C Y and Z are isotopes of elements in the same period of the Periodic Table. A) The nitrogen atom has a mass number of approximately 7 daltons and an atomic mass of 14. The nucleus of a nitrogen atom contains 7 neutrons and 7 protons. b. (A) The nitrogen atom has a mass number of approximately 7 daltons and an atomic mass of 14. Which statement is correct about a line emission spectrum? 1. a. (i) Hydrogen has three isotopes, of which protium is the most common. The nucleus of a nitrogen atom contains 7 neutrons and 7 protons. A) The nitrogen atom has a mass number of approximately 7 daltons and an atomic mass of 14. B) The nitrogen atom has a mass number of approximately 14 daltons and an atomic mass of 7. Nitrogen (N) is much more electronegative than hydrogen (H). 4) Which species is an isotope of 39 Cl? Fusion is the process by which lighter elements combine to form heavier elements. (d) Dihydrogen does not act as a reducing agent. A) The nitrogen atom has a mass number of approximately 7 daltons and an atomic mass of 14. A radioactive isotope of nitrogen has 9 neutrons. (a) Hydrogen has three isotopes of which protium is the most common. MCQ Questions for Class 9 Science with Answers were prepared based on the latest exam pattern. C Methane is a compound. c. It can be accomplished biologically, by algae. The most stable radioisotope of hydrogen is tritium. The variety of neutrons in an atom's nucleus looks to confirm whether or no longer it is going to likely be volatile. (c) Hydrogen ion, H +, exists freely in solution. State the nuclear symbol notation, \({}_Z^AX\), for magnesium-26. Answer all the questions. Each isotope comprehends of unique properties. Which of the following statements about Hydrogen are correct? 2 They are atoms which have the same number of electrons and neutrons but different numbers of protons. A) 1, 2 and 3 are correct. As we know, all atoms are formed by three particles: protons, neutrons and electrons. Which statement about W, X, Y and Z is correct? B)An electron and a proton both have a charge of-1. The percent abundance of protium, deuterium and tritium are 99.985, 0.0156 and 1 0 − 1 5 respectively. Option c is the correct answer. 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