Hydrogen vs Silicon

Side-by-side comparison of Hydrogen (H, element 1) and Silicon (Si, element 14) by atomic structure and physical properties.

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PropertyH Hydrogen Si Silicon
Atomic number114
SymbolHSi
NameHydrogenSilicon
Categorynonmetalmetalloid
Standard Atomic Weight1.007975 u28.085 u
Period13
Group114
Blocksp
Phase at STPGasSolid
Electron configuration1s1[Ne]3s23p2
Oxidation states[-1, 1][-4, -3, -2, -1, 0, 1, 2, 3, 4]
Electronegativity (Pauling)2.21.9
Electron affinity0.75419 eV1.385 eV
Density0.08988 kg/m³2329.6 kg/m³
Melting point-259.193 °C1413.85 °C
Boiling point-252.781 °C3264.85 °C
Discovery year17661824

Key Differences

PropertyH HydrogenSi Silicon
Standard Atomic Weight1.007975 u ↓ lower28.085 u ↑ higher
Density0.08988 kg/m³ ↓ lower2329.6 kg/m³ ↑ higher
Melting point-259.193 °C ↓ lower1413.85 °C ↑ higher
Boiling point-252.781 °C ↓ lower3264.85 °C ↑ higher
Electronegativity (Pauling)2.2 ↑ higher1.9 ↓ lower
Electron affinity0.75419 eV ↓ lower1.385 eV ↑ higher
Period1 3
Group1 14
Blocks p
Categorynonmetal metalloid
Phase at STPGas Solid
Electron configuration1s1 [Ne]3s23p2
Discovery year1766 1824