Question

answer these two questions​

Answer 1

Answer:

a is chlorine (cl)

b is carbon (c)

c is magnesium (mg)

valency

a valency= 1 - (outer shell has 7 so 8-7)

b valency= 4 - (outer shell has 4 = 4 )

c valency =2-( outer shell has 2 electrons =2 as in the outer most shell if there is less than 4 electrons or just 4 electrons the valency is the number of electrons in the last shell .but if in the last shell there are more than 4 electrons then it is 8 minus number of electrons in the  last shell)