Question

2, 20
3
Periodicity of
in decimal form is ....
ots
1) 428571
2) 4285
3) 6
4) 4

Answer 1

Answer:

Distribution of elctrons

Atom

Symbol

Electron

number

in the

atom

Shell symbol (maximum capacity)

K (2) L (8) M (18) N (32)

Electronic

configuration in the

numerical form

H

1

1

1

Не

2

2

2

Li

3

2

1

2,1

C С

6

N

7

8

Hydrogen

Helium

Lithium

Carbon

Nitrogen

Oxygen

Fluorine

Neon

Sodium

Chlorine

Argon

Bromine

9

Ne

10

Na

11

СІ

17

Ar

18

Br

35