Question

Define valency by taking the example of silicon and oxygen

Answer 1

★valance: it is a combining capacity if an atom .

#silicon (Si) = atomic no. – 15
shell K L M N
2 8 5 -
so valance = 8-5 = 3
#oxygen (O) = Atomic no. – 8
shell K L M N
2 6
so valence = 8-6= 2

Answer 2

hey mate here is your answer

VALENCY:the valency is the combining capacity of an atom .the valency is equal is equal to the number of electrons in the outermost shell of an atom
for example:Silicon,has the following electronic distribution