Question

if an atom of elements contain 3 electron in third shell or the outermost shell find the electronic configuration of the atomic number of protons, valancy, name of element ,nature metal or non metal​

Answer 1

configuration will be ====>

2 8 3

it's atomic no. = 2+8 +3 = 13
valency = 3
no. of proton s =no. of electron = 13
name ==> aluminum
it is metal

Answer 2

K  L  M  N

2  8  3   - (until all the shells are not filled you cannot fill its succesive shell)

VALENCY:- 3

ATOMIC NO. OF PROTONS:- 13

NAME OF THE ELEMENT:- Aluminium

NATURE OF ALUMINIUM:- Metal

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