Chemical element
Chromium
- Cr
- Z = 24
- transition metal
Chromium (Cr) is element 24, a transition metal in period 4 and group 6. Its standard atomic weight is 51.996 Da. Weights follow IUPAC standard atomic weights, 2021 revision.
Identity
SymbolCr
Standard atomic weight51.996atomic mass units (Da)
Mass in kilograms8.6341389 × 10^-26
Categorytransition metal
Group6
Period4
Blockd-block
Electrons in a neutral atom24
Neutrons in the most common isotope28≈
Quantities
Molar mass51.996 g/mol
Mass of one mole51.996 grams
Atoms in one gram1.1581931 × 10^22
Mass of one atom8.6341389 × 10^-23 g
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Group 6
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