Question

GSTRU and P belong to the same period in the periodic table. The ions formed by the atoms are as below:-
Q²⁺, U^-, T^2-, R³⁺, P⁺, S^3-

1. Arrange the elements in order of decreasing atomic size.
2. Suggest a reason why elements P and Q cannot react with each to form a compound.

Answer 1

1. Arrange the elements in order of decreasing atomic size.
   U ,T ,S ,R ,Q ,P 
                 →
   Decreasing atomic size
2. Suggest a reason why elements P and Q cannot react with each to form a compound.
   • Both P and Q need to loose electrons to become stable, therefore they cannot react to form a compound.