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H vs C vs O
PropertyH C O
Atomic number168
Mass1.00812.01115.999
CategoryReactive NonmetalReactive NonmetalReactive Nonmetal
BlockSPP
Period122
Group11416
Phase nowGasSolidGas
Melting point14.01 K3,823 K54.36 K
Boiling point20.28 K4,098 K90.2 K
Electronegativity2.22.553.44
Electron shells12-42-6