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Compare Zinc vs Chromium

Comparing Zinc (Zn) and Chromium (Cr). Atomic numbers 30 and 24 with atomic masses 65.382 u and 51.996 u, classified as transition metal and transition metal. 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
Zn
Zinc
#30
Cr
Chromium
#24

Periodic properties of the elements

ZincChromium
SymbolZnCr
Atomic number3024
Group126
Period44
Blockdd
Element categoryTransition MetalTransition Metal

Physical properties

ZincChromium
Phase at STPSolidSolid
Density7.14 g/cm37.19 g/cm3
Atomic weight65.382 u51.9962 u
Melting point692.68 K
419.53 °C
787.154 °F		2180 K
1906.85 °C
3464.33 °F
Boiling point1180 K
906.85 °C
1664.33 °F		2944 K
2670.85 °C
4839.53 °F

Atomic properties

ZincChromium
Electronegativity (Pauling Scale)1.651.66
Electron affinity-58 kJ/mol65.21 kJ/mol
Oxidation states−2, 0, +1, +2
(an amphoteric oxide)		−4, −2, −1, 0, +1, +2, +3, +4, +5, +6
(depending on the oxidation state, an acidic, basic, or amphoteric oxide)
Ionization energies
  1. 906.4 kJ/mol
  2. 1733.3 kJ/mol
  3. 3833 kJ/mol
  4. 5731 kJ/mol
  5. 7970 kJ/mol
  6. 10400 kJ/mol
  7. 12900 kJ/mol
  8. 16800 kJ/mol
  9. 19600 kJ/mol
  10. 23000 kJ/mol
  11. 26400 kJ/mol
  12. 29990 kJ/mol
  13. 40490 kJ/mol
  14. 43800 kJ/mol
  15. 47300 kJ/mol
  16. 52300 kJ/mol
  17. 55900 kJ/mol
  18. 59700 kJ/mol
  19. 67300 kJ/mol
  20. 71200 kJ/mol
  21. 179100 kJ/mol
  1. 652.9 kJ/mol
  2. 1590.6 kJ/mol
  3. 2987 kJ/mol
  4. 4743 kJ/mol
  5. 6702 kJ/mol
  6. 8744.9 kJ/mol
  7. 15455 kJ/mol
  8. 17820 kJ/mol
  9. 20190 kJ/mol
  10. 23580 kJ/mol
  11. 26130 kJ/mol
  12. 28750 kJ/mol
  13. 34230 kJ/mol
  14. 37066 kJ/mol
  15. 97510 kJ/mol
  16. 105800 kJ/mol
  17. 114300 kJ/mol
  18. 125300 kJ/mol
  19. 134700 kJ/mol
  20. 144300 kJ/mol
  21. 157700 kJ/mol
  22. 166090 kJ/mol
  23. 721870 kJ/mol
  24. 761733 kJ/mol

Electron configuration

ZincChromium
Shorthand configuration[Ar] 3d10 4s2 [Ar] 3d5 4s1
Full configuration1s2 2s2 2p6 3s2 3p6 3d10 4s2 1s2 2s2 2p6 3s2 3p6 3d5 4s1
Electrons per shell2, 8, 18, 22, 8, 13, 1

History

ZincChromium
DiscoveryIndian metallurgists (1000 BC)Louis Nicolas Vauquelin (1794)
First isolationAndreas Sigismund Marggraf (1746)Louis Nicolas Vauquelin (1797)
Named byParacelsus
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