Question

Write out the first 20 element sybols atomic number mass number and neutron numbers

Answer 1

Answer:

1st 20 elements

1. hydrogen
2. helium
3. lithium
4. beryllium
5. boron
6. carbon
7. nitrogen
8. oxygen
9. fluorine
10. neon
11. sodium
12. magnesium
13. aluminum
14. silicon
15. phosphorus
16. sulphur
17. chlorine
18. argon
19. potassium
20. calcium

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