Question

(a) What are ‘groups’ and ‘periods’ in the periodic table?
(b) Two elements M and N belong to groups I and II respectively and are in the same period of the periodic table. How do the following properties of M and N vary?
(i) Sizes of their atoms.
(ii) Their metallic characters.
(iii) Their valencies in forming oxides.
(iv) Molecular formula of their chlorides.

Answer 1

Explanation:

minimum size

magnet and nail

group and peroods

magnet +nail