Question

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

Answer 1

(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.