Question

atomic mass of the frist 20 elements
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Answer 1

Answer:

18 Argon 39.948

19 Potassium 39.098

20 Calcium 40.078

21 Scandium 44.956

Answer 2

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. 180

11.) Sodium = 22.990

12.) magnesium = 24.305

13.) aluminium = 26.982

14.) silicon = 28.085

15.) phosphours = 30.974

16.) sulphur = 32.06

17.) chlorine = 34.45

18.) argon = 39.948

19.) potassium = 39.098

20.) calcium = 40.078

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