Question

please answer this question as soon as possible​

Answer 1

Answer:

Explanation:

(I) P,Q and T are isotopes.They are atoms of the same element having

same atomic number and different atomic mass.

similarly S and T are isotopes.

(ii) T is a monovalent atom

(Iii) P has a mass number 20

(IV) P,Q,andT are inert gas atom

(V) R and S