Structures of nuclei of three atoms A, B, and C are given below: A has 90 protons and 146 neutrons. B has 92 protons and 146 neutrons. C has 90 protons and 148 neutrons. Based on the above data, which of these atoms are isotopes and which are isobars?
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Q3
An element has two isotopes with atomic masses (A−1) and (A+3) respectively. The average atomic mass is A. Calculate the mole percentage of the heavier isotope.
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Q4
Sulphur has many isotopes such as Sulphur−32 Which of the following are a different isotope of Sulphur−32?
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Q5
Atom A has a mass number 209 and atomic number 82.
Atom B has a mass number 209 and atomic number 83.
(i) How many protons atom A has ?
(ii) How many protons atom B has ?
(iii) Are atoms A and B isotopes of the same element ?