Question

Atomic number Element Atomic mass & Symbol
1 to 20​

Answer 1

Atomic Number

Element

Atomic Mass

1

Hydrogen

1.008

2

Helium

4.0026

3

Lithium

6.94

4

Beryllium

9.0122

5

Boron

10.81

6

Carbon

12.011

7

Nitrogen

14.007

8

Oxygen

15.999

9

Fluorine

18.998

10

Neon

20.18

11

Sodium

22.99

12

Magnesium

24.305

13

Aluminium

26.982

14

Silicon

28.085

15

Phosphorus

30.974

16

Sulfur

32.06

17

Chlorine

35.45

18

Argon

39.948

19

Potassium

39.098

20

Calcium

40.078

21

Scandium

44.956

22

Titanium

47.867

23

Vanadium

50.942

24

Chromium

51.996

25

Manganese

54.938

26

Iron

55.845

27

Cobalt

58.933

28

Nickel

58.693

29

Copper

63.546

30

Zinc

65.38