Question

1 to 20 atomic number and weights.​

Answer 1

Explanation:

Atomic Number

Element

Atomic Mass

1

Hydrogen

1.008

2

Helium

4.0026

3

Lithium

6.94

4

Beryllium

9.0122

5

Boron

10.81

6

Carbon

12.011

7

Nitrogen

14.007

8

Oxygen

15.999

9

Fluorine

18.998

10

Neon

20.18

11

Sodium

22.99

12

Magnesium

24.305

13

Aluminium

26.982

14

Silicon

28.085

15

Phosphorus

30.974

16

Sulfur

32.06

17

Chlorine

35.45

18

Argon

39.948

19

Potassium

39.098

20

Calcium

40.078

Answer 2

PLS MAKE ME THE BRAINLIEST.

Explanation:

Atomic Number of Elements from 1 to 30

Let us take a look at what is the atomic mass of elements from 1 to 30.

Atomic Number Element Atomic Mass

1. Hydrogen 1.008

2. Helium 4.0026

3. Lithium 6.94

4 Beryllium. 9.0122

5. Boron. 10.81

6. Carbon. 12.011

7. Nitrogen. 14.007

8. Oxygen. 15.999

9. Fluorine. 18.998

10. Neon. 20.18

11. Sodium. 22.99

12. Magnesium. 24.305

13. Aluminium 26.982

14. Silicon. 28.085

15. Phosphorus 30.974

16. Sulfur. 32.06

17. Chlorine. 35.45

18. Argon. 39.948

19. Potassium. 39.098

20. Calcium. 40.078.