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Compare Sodium vs Hydrogen

Comparing Sodium (Na) and Hydrogen (H). Atomic numbers 11 and 1 with atomic masses 22.99 u and 1.008 u, classified as alkali metal and nonmetal. Below: a side-by-side comparison of their physical, atomic, electron-configuration and historical properties, including density, melting and boiling points, ionization energies, oxidation states and discovery history.

vs
Na
Sodium
#11
H
Hydrogen
#1

Periodic properties of the elements

SodiumHydrogen
SymbolNaH
Atomic number111
Group11
Period31
Blockss
Element categoryAlkali MetalNonmetal

Physical properties

SodiumHydrogen
Phase at STPSolidGas
Density0.968 g/cm30.08988 g/cm3
Atomic weight22.9898 u1.0079 u
Melting point370.944 K
97.794 °C
208.0292 °F		13.99 K
-259.16 °C
-434.488 °F
Boiling point1156.09 K
882.94 °C
1621.292 °F		20.271 K
-252.879 °C
-423.1822 °F

Atomic properties

SodiumHydrogen
Electronegativity (Pauling Scale)0.932.2
Electron affinity52.867 kJ/mol72.769 kJ/mol
Oxidation states−1, +1
(a strongly basic oxide)		−1, +1
(an amphoteric oxide)
Ionization energies
  1. 495.8 kJ/mol
  2. 4562 kJ/mol
  3. 6910.3 kJ/mol
  4. 9543 kJ/mol
  5. 13354 kJ/mol
  6. 16613 kJ/mol
  7. 20117 kJ/mol
  8. 25496 kJ/mol
  9. 28932 kJ/mol
  10. 141362 kJ/mol
  11. 159076 kJ/mol
  1. 1312 kJ/mol

Electron configuration

SodiumHydrogen
Shorthand configuration[Ne] 3s1 1s1
Full configuration1s2 2s2 2p6 3s1 1s1
Electrons per shell2, 8, 11

History

SodiumHydrogen
DiscoveryHumphry Davy (1807)Henry Cavendish (1766)
First isolationHumphry Davy (1807)Henry Cavendish (1766)
Named byAntoine Lavoisier (1783)
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