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HISTORY
X

1

H

Hydrogen

Atomic Mass1.008
Period1
Standard StateGas
Electronic Confi1s1
Electron Negativity2.2
Electron Affinity72.769
Density0.08988
Discovered byHenry Cavendish
Molar Heat28.836
Boiling Point
20°K ,20°C ,-423°F

Electron

1

Proton

1

Neutron

1

Summary:

Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of 1.00794 u, hydrogen is the lightest element on the periodic table. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass.

Spectrals Line:
Image Not Available

Electronic Configuration Semantic:

1s1

Ionization Energy:

 1312,

Melting Point:
14°K ,-259.15°C ,-434°F
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