Question

write 20 names of element with atom numbers and symbols​

Answer 1

hydrogen,h,1

helium,he,2

oxygen,o,6

chlorine,cl,17

calcium,CA,20

sodium,na,11

Answer 2

Explanation:

1 Hydrogen H

2 Helium He

3 Lithium Li

4 Beryllium Be

5 Boron B

6 Carbon C

7 Nitrogen N

8 Oxygen O

9 Fluorine F

10 Neon Ne

11 Sodium Na

12 Magnesium Mg

13 Aluminium AI

14Silicon Si

15 Phosphorus P

16 Sulfur S

17 Chlorine Cl

18 Argon Ar

19 Potassium K

20 Calcium Ca