20 Elements

Front 1

Hydrogen

Back 1

H

Front 2

Helium

Back 2

He

Front 3

Leithum

Back 3

Li

Front 4

Bierlyum

Back 4

Bi

Front 5

Boron

Back 5

B

Front 6

Carbon

Back 6

C

Front 7

Nitrogen

Back 7

N

Front 8

Oxygen

Back 8

O

Front 9

Flourine

Back 9

F

Front 10

Neon

Back 10

Ne

Front 11

Sodioum

Back 11

So

Front 12

Magnisum

Back 12

Mg

Front 13

Aluimnum

Back 13

Al

Front 14

Silicon

Back 14

si

Front 15

Phosuhrs

Back 15

P

Front 16

Sulfuir

Back 16

S

Front 17

Clhorine

Back 17

Cl

Front 18

Argon

Back 18

Al

Front 19

Potassium

Back 19

K

Front 20

Calcium

Back 20

C