All the elements in a group have the |
|||
(a) |
same valency |
(b) |
different valency |
(c) |
variable valency |
(d) |
none of these |
All the elements in a group have the |
|||
(a) |
same valency |
(b) |
different valency |
(c) |
variable valency |
(d) |
none of these |