Question

please answer fast .....

Answer 1

1)Number of Electron=8+8+2=18
So, The number of Electron=Number of proton.So,the number of proton=18
2)Atomic number of Element=Number of proton=Number of Electron=18
3)Valency=0 because it completes the shell

Answer 2

Hey mate.........

Here is your answer.........

a) No. Of electrons = no. Of protons = 2 +8+8 =18

b) Atomic no. = no. Of protons

Atomic no. = 18

c) Last shell contain 8 electrons

We know that combining capacity of element is 1,2,3. So it have more than 1,2,3 electrons in its last shell

So valency = 8 - no. Of electrons

= 8-8 = 0

Therefore here r ur answers

a) 18

b) 18

c) 0

HOPE THIS WILL HELP YOU.......