Question

1 to 20 elements with atomic number electron configuration and valency and valence electrons

Answer 1

Explanation:

H - Hydrogen

He - Helium

Li - Lithium

Be - Beryllium

B - Boron

C - Carbon

N - Nitrogen

O - Oxygen

F - Fluorine

Ne - Neon

Na - Sodium

Mg - Magnesium

Al - Aluminum

Si - Silicon

P - Phosphorus

S - Sulfur

Cl - Chlorine

Ar - Argon

K - Potassium

Ca - Calcium

Answer 2

H- hyrogen(1)

He- helium 2

Li- lithium 3

Be- berelium 4

B- boron 5

C- carbon 6

N- nitrogen 7

O- oxygen 8

F- flourine 9

Ne- neon 10

Na-sodium11

Mg-magnisum 12

Al- alminium 13

Si- silicon 14

P-phosphprous 15

S- sulphur 16

Cl-chlorine 17

Ar-argon 18

K-potassium 19

Ca-calcium 20