Question

Consider the following elements : Ca, O, Ar, S, Be and He
Which of the above elements would you expect to be
(a) in group II A of the periodic table ?
(b) in group VI A of the periodic table ?

Answer 1

Answer:

Explanation:

1.argon

berilium , calcium

3.oxygen, sulphur

Answer 2

Answer:

a) Ca and Be are in group 2 since number of valence electrons in each is 2.

b) O and  S belongs to group 16 since number of valence electrons in each is 6.