Question

first 20 elements of the periodic table with atomic number and mass

Answer 1

hey genius
here is your answer

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ATOMIC NO. - ELEMENT - MASS

1 - HYDROGEN. - 1.9

2. - HELIUM. - 4

3. - LITHIUM. - 6

4. - BERYLLIUM. - 9

5. - BORON. - 10

6. - CARBON. - 12

7. - NITROGEN. - 14

8. - OXYGEN. - 15.9

9. - FLUORINE. - 18.9

10. - NEON. - 20

11. - SODIUM. - 22

12. - MAGNESIUM. - 24

13. - ALUMINUM. - 26.7

14. - SILICONE. - 28

15. - PHOSPHORUS. - 30

16 - SULFUR. 32

17 CHLORINE. - 35

18. - ARGON. - 39.9

19 - POTASSIUM. - 39

20 - CALCIUM. - 40

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