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Compare Nitrogen vs Arsenic

Comparing Nitrogen (N) and Arsenic (As). Atomic numbers 7 and 33 with atomic masses 14.006 u and 74.922 u, classified as nonmetal and metalloid. 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
N
Nitrogen
#7
As
Arsenic
#33

Periodic properties of the elements

NitrogenArsenic
SymbolNAs
Atomic number733
Group1515
Period24
Blockpp
Element categoryNonmetalMetalloid

Physical properties

NitrogenArsenic
Phase at STPGasSolid
Density1.251 g/cm35.727 g/cm3
Atomic weight14.0064 u74.9216 u
Melting point63.15 K
-210 °C
-346 °F		-
Boiling point77.355 K
-195.795 °C
-320.431 °F		-

Atomic properties

NitrogenArsenic
Electronegativity (Pauling Scale)3.042.18
Electron affinity-6.8 kJ/mol77.65 kJ/mol
Oxidation states−3, −2, −1, +1, +2, +3, +4, +5
(a strongly acidic oxide)		−3, −2, −1, 0, +1, +2, +3, +4, +5
(a mildly acidic oxide)
Ionization energies
  1. 1402.3 kJ/mol
  2. 2856 kJ/mol
  3. 4578.1 kJ/mol
  4. 7475 kJ/mol
  5. 9444.9 kJ/mol
  6. 53266.6 kJ/mol
  7. 64360 kJ/mol
  1. 947 kJ/mol
  2. 1798 kJ/mol
  3. 2735 kJ/mol
  4. 4837 kJ/mol
  5. 6043 kJ/mol
  6. 12310 kJ/mol

Electron configuration

NitrogenArsenic
Shorthand configuration[He] 2s2 2p3 [Ar] 3d10 4s2 4p3
Full configuration1s2 2s2 2p3 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p3
Electrons per shell2, 52, 8, 18, 5

History

NitrogenArsenic
DiscoveryDaniel Rutherford (1772)Zosimos of Panopolis (300)
First isolationDaniel Rutherford (1772)
Named byJean-Antoine Chaptal (1790)
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