Question

Electronic Configuration Atomic Number 1 to 20​

Answer 1

Answer:

Electronic Configuration of First 30 Elements with Atomic Numbers

Atomic NumberName of the ElementElectronic Configuration18Argon (Ar)[Ne] 3s2 3p619Potassium (K)[Ar] 4s120Calcium (Ca)[Ar] 4s221Scandium (Sc)[Ar] 3d1 4s2

Answer 2

Explanation:

Hydrogen

1

1s1

Helium

2

1s2

Period 2

Lithium

3

1s2 2s1

Beryllium

4

1s2 2s2

Boron

5

1s2 2s22p1

Carbon

6

1s2 2s22p2

Nitrogen

7

1s2 2s22p3

Oxygen

8

1s2 2s22p4

Fluorine

9

1s2 2s22p5

Neon

10

1s2 2s22p6

Period 3

Sodium

11

1s2 2s22p63s1

Magnesium

12

1s2 2s22p63s2

Aluminum

13

1s2 2s22p63s23p1

Silicon

14

1s2 2s22p63s23p2

Phosphorus

15

1s2 2s22p63s23p3

Sulfur

16

1s2 2s22p63s23p4

Chlorine

17

1s2 2s22p63s23p5