Question

Atomic no. and atomic mass of all elementsin chemistry

Answer 1

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Element↔atomic no.↔mass no.
hydrogen ↔1↔1
Helium↔2↔4
Lithium↔3↔6
Berilium↔4↔8
Boron↔5↔10
Carbon↔6↔12
Nitrogen↔7↔14
Oxygen ↔8↔16
Flourine↔9↔18
Neon↔10↔20
Sodium ↔11↔22
Magnesium ↔12↔24
Aluminum ↔13↔26
Silicon ↔14↔28
Phosphorus ↔15↔30
Sulphur ↔16↔32
Chlorine ↔17↔34
Argon↔18↔36
Potassium ↔19↔38
Calcium ↔20↔40
mm⚠