Question

write the atomoic mass number at least 10 elements​

Answer 1

Answer:

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

Explanation:

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Answer 2

Explanation:

Here ,I have written mass numbers of some very important elements-

Hydrogen=1 u,

Helium=4u

Nitrogen=14 u

Carbon=12 u

Oxygen=16u

Sodium=23 u

Potassium=39u

Magnesium=24 u

Aluminium=26 u

Chlorine=35.5 u

Calcium=40 u

Iron=56 u