i. Isotopes are atoms of the same element with different:




... Answer is (a)  atomic mass
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ii. One of the isotopes of uranium is `\ ^{238}U_92` The number of neutrons in this isotope is:




... Answer is (b)  146
Formula for finding Numbers of Neutron: Numbers of Neutron = Atomic Mass - Atomic Number Numbers of Neutron = 238 - 92 Numbers of Neutron = 146


iii. Which among the following radiations has more penetrating power?




... Answer is (b) a gamma ray
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iv. What happens to the atomic number of an element that emits one alpha particle?




... Answer is (c)  decreases by 2
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v. The half-life of a certain isotope is 1 day. What is the quantity of the isotope after 2 days?




... Answer is (b) one quarter
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vi. When Uranium (92 protons) ejects a beta particle, how many protons will be in the remaining nucleus?




... Answer is (d) 93 protons
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vii. Release of energy by the Sun is due to::




... Answer is (b) nuclear fusion
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viii. When a heavy nucleus splits into two lighter nuclei, the process would




... Answer is (a) release nuclear energy



ix.. The reason carbon-dating works is that:




... Answer is (b) after a plant or animal dies, it stops taking in fresh carbon-14
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VIP Note: If you have Learned the above MCQs, then examine yourself by taking this Simple MCQS Quiz (Click here to play the Quiz)


 
Unit-18:  Atomic and Nuclear Physics
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List of Class:10 MCQs Quizzes

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