Question

Four elements P, Q, R and S have atomic numbers 12, 13, 14 and 15 respectively.
a) Which one of these is most reactive? Justify
b) Arrange them in the increasing order of metallic character
c) Classify these as metals and non-metals​

Answer 1

Explanation:

3. P and Q are metals while S is a non-metal, R is a metalloid.