give the atomic masses of important element for class 9

hydrogen=1

helium=4

lithium=7

beryllium=9

boron=11

carbon=12

nitrogen=14

oxygen=16

flourine=19

neon=20

sodium=23

magnesium=24

aluminium=27

sulphur=32

phosphorus=31

chlorine=35.5

argon=40

pottasium=39

cacium=40

iron=56

copper=63.5

zinc=65

siver=108

platinum=195

gold=197

lead=207

uranium=238

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