Question

First 20 elements atomic mass and atomic number

Answer 1

The atomic number and atomic mass of the first twenty elements are as follows: (Consider the numbering as the atomic number)

1. Hydrogen - 1.008 g
2. Helium - 4.003 g
3. Lithium - 6.941 g
4. Beryllium - 9.012 g
5. Boron - 10.811 g
6. Carbon - 12.011 g
7. Nitrogen - 14.007 g
8. Oxygen - 16 g
9. Fluorine - 18.998 g
10. Neon - 20.180 g
11. Sodium - 22.990 g
12. Magnesium - 24.305 g
13. Aluminium - 26.982 g
14. Silicon - 28.086 g
15. Phosphorous - 30.974 g
16. Sulfur - 32.065 g
17. Chlorine - 35.453 g
18. Argon - 39.948 g
19. Potassium - 39.098 g
20. Calcium - 40 g

Answer 2

Explanation:

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