Question

List of first 20 elements with atomic numbers and mass

Answer 1

First 20 elements with atomic number and mass number

In the following list bold items represents Mass, whereas corresponding number represents atomic number

1. Hydrogen - 1.008
2. Helium - 4.003
3. Lithium - 6.941
4. Beryllium - 9.012
5. Boron - 10.811
6. Carbon - 12.011
7. Nitrogen - 14.007
8. Oxygen - 15.998
9. Fluorine - 18.998
10. Neon - 20.180
11. Sodium - 22.990
12. Magnesium - 24.305
13. Aluminium - 26.982
14. Silicon - 283086
15. Phosphorous - 30.974
16. Sulfur - 32.066
17. Chlorine - 35.453
18. Argon - 39.948
19. Potassium - 39.098
20. Calcium - 40.079

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