Question

In which group do all the elements have a valency of one?
(a) Hydrogen, oxygen, chlorine
(b) Potassium, hydrogen, sulphur
(c) Sodium, chlorine, hydrogen
(d) Sodium, hydrogen, sulphur

Answer 1

Answer:

All group 1 elements have 1 valency

here

C) SODIUM, CHLORINE,HYDROGEN Are all group 1 elements have have valency of 1