Chemical Elements 1-20

Atomic number of hydrogen

• 3

• 5

• 1

• 2

Atomic number of helium

• 8

• 1

• 4

• 2

Atomic number of lithium:

• 3

• 8

• 10

• 15

Atomic number of beryllium:

• 16

• 14

• 4

• 9

Atomic number of boron:

• 5

• 3

• 12

• 20

Atomic number of carbon:

• 12

• 8

• 6

• 19

Atomic number of nitrogen:

• 17

• 13

• 5

• 7

Atomic number of oxygen:

• 18

• 1

• 8

• 11

Atomic number of fluorine:

• 9

• 10

• 5

• 7

Atomic number of neon:

• 12

• 1

• 15

• 10