Question

Identify the similarity in the atoms of pairs of elements given below:
(i) Na (atomic number=11) and
K (atomic number=19)
(ii) B (atomic number=5) and
C (atomic number=6)

Answer 1

Answer:

Explanation:

i) Both Na and K belongs to the same group (group I). Both contains same number of electrons in their valence shells i.e. 1

(ii) Both B and C belong to the same period (2nd period). Both contains same number of shells i.e. 2