24 Cr 51.99616

Chromium

TRANSITION METAL

Phase: Solid

Discovered: Louis Nicolas Vauquelin

Block: D

Summary

Chromium is a chemical element with symbol Cr and atomic number 24. It is the first element in Group 6. It is a steely-gray, lustrous, hard and brittle metal which takes a high polish, resists tarnishing, and has a high melting point.

Appearance: silvery metallic

Source: Wikipedia

Physical Properties

Atomic Mass 51.99616 u

Density 7.19 g/cm³

Melting Point 2180 K

Boiling Point 2944 K

Molar Heat 23.35 J/(mol·K)

Electron Affinity 65.21 kJ/mol

Ionization Energies

1^st: 652.9 kJ/mol

2^nd: 1590.6 kJ/mol

3^rd: 2987 kJ/mol

4^th: 4743 kJ/mol

5^th: 6702 kJ/mol

6^th: 8744.9 kJ/mol

7^th: 15455 kJ/mol

8^th: 17820 kJ/mol

9^th: 20190 kJ/mol

10^th: 23580 kJ/mol

11^th: 26130 kJ/mol

12^th: 28750 kJ/mol

13^th: 34230 kJ/mol

14^th: 37066 kJ/mol

15^th: 97510 kJ/mol

16^th: 105800 kJ/mol

17^th: 114300 kJ/mol

18^th: 125300 kJ/mol

19^th: 134700 kJ/mol

20^th: 144300 kJ/mol

21^th: 157700 kJ/mol

22^th: 166090 kJ/mol

23^th: 721870 kJ/mol

24^th: 761733 kJ/mol