Sarthaks Test
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On the basis of the number of protons, neutrons and electrons in the samples given below identify 

(i) the cation 

(ii) the pair of isobars, and 

(iii) the pair of isotopes

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1 Answer

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(i) Sample A has more protons compare to electrons. If a neutral atom loses electrons, it gets net positive charge and is known as a cation. 

(ii) Isobars are the atoms of different Sample B and C have same mass number (protons + neutrons) but different atomic numbers. Hence, they are a pair of isobars. 

(iii) Samples C and D have same atomic number but different mass numbers. Hence, they are a pair of isotopes.

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