Question

Question 40:
The combining capacity of oxygen is.........
A)
2
B)
3
C)
0
D)
1​

Answer 1

Answer:

Valency of atom is defined as its capacity to donate, gain or share electron to attain stability.

Oxygen atom electronic configuration is − 1s

2

2s

2

2p

4

.

Oxygen gains two electrons to fulfill its valence shell. Hence, its valency is two.

Therefore, the correct option is B.