Question

list some atomic number

Answer 1

atomic NO. with element from 1-20



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