Chromium (Cr) – Periodic Table [Element Information & More]

chromium element periodic table

Chromium element (Cr) is in group 6 and period 4 of a periodic table. Chromium is in the d-block and it is classified as a transition element on the periodic table.

There is a lot more information related to chromium which is mentioned in the Information Table given below.

So let’s dive right into it!

Table of contents

Chromium Element (Information Table)

The important data related to chromium element is given in the table below.

Appearance of chromiumSilvery gray metallic appearance
Atomic number of chromium24
Symbol of chromiumCr
Atomic mass of chromium51.996 u
Protons, Neutrons & Electrons in chromiumProtons: 24, Neutrons: 28, Electrons: 24
State of chromium (at STP)Solid
Group number of chromium in periodic table6
Period number of chromium in periodic table4
Block of chromium in periodic tabled-block
Category of chromiumTransition metals
Bohr model or Electrons per shell or Electrons arrangement in chromium2, 8, 13, 1
Electron configuration of chromium[Ar] 3d5 4s1
Orbital diagram of chromiumorbital diagram of chromium
Electronegativity of chromium (on pauling scale)1.66
Atomic radius of chromium (van der Waals radius)189 picometers
Density of chromium7.19 g/cm3
1st ionization energy of chromium6.767 eV
Main isotope of chromium52Cr
Melting point of chromium2180 K or 1907 °C or 3465 °F
Boiling point of chromium2944 K or 2671 °C or 4840 °F
Crystal structure of chromiumBody Centered Cubic (BCC)
Discovery of chromiumBy Louis Nicolas Vauquelin in 1794

Also see: Interactive Periodic Table (It has rotating bohr models as well as many other details of all the 118 elements in a single periodic table).

Chromium element in Periodic table

The Chromium element (Cr) has the atomic number 24 and is located in group 6 and period 4. Chromium is a metal and it is classified as a transition element.

Click on above elements in the periodic table to see their information.

Facts about chromium

Here are a few interesting facts about chromium element.

  1. The name “Chromium” came from the Greek word “chroma”, which means color.
  2. Chromium is the 3rd hardest element found on the entire periodic table (first is carbon (diamond) and second is boron).
  3. Chromium is the 21st most abundant element present in the earth’s crust.
  4. Chromite is the ore from which the majority of chromium is obtained.
  5. Earth’s crust has around 100 ppm concentration of chromium element.
  6. The leading producer of chromium in the entire world is South Africa.
  7. Chromium is mostly used in industries as an alloying element with other metals to increase its strength and other properties.

Properties of chromium

Here is a list of some physical properties and chemical properties of chromium.

Physical properties of chromium

  • Chromium has a silvery-gray metallic appearance.
  • Chromium has a density of 7.19 g/cm3 and its atomic mass is 51.996 u.
  • Chromium has many isotopes, out of which the most abundant isotope is 52Cr.
  • The melting point and boiling point of chromium is 2180 K and 2944 K respectively.

Chemical properties of chromium

  • Chromium is somewhat reactive metal and hence it is not found in its free state in nature. Chromium is always found as a compound with other elements.
  • Chromium is resistant to corrosion and so it is used as a protective layer on the other metals.
  • The electronic configuration of chromium is [Ar] 3d5 4s1 and it has incomplete d-orbitals.

Uses of chromium

Here are some uses of the chromium element.

  • Chromium is used in manufacturing of stainless steel and the stainless steel contains around 11% chromium in it.
  • Chromium plating gives a shiny appearance and hence it is used in coating of car parts, some home appliances, etc.
  • The chromium salts are used in leather tanning.
  • Chromium is also used in electroplating of other metals which prevents them from corrosion.
  • Chromium is also used in heat resistant bricks, which can retain its strength at higher temperatures.
  • The chromium is also used in making pigments.

External resources:

  1. Chromium – Element information, properties and uses | Periodic Table. (n.d.). Chromium – Element Information, Properties and Uses | Periodic Table.
  2. Chromium – Wikipedia. (2018, October 11). Chromium – Wikipedia.
  3. P. (n.d.). Chromium | Cr (Element) – PubChem. Chromium | Cr (Element) – PubChem.
  4. It’s Elemental – The Element Chromium. (n.d.). It’s Elemental – the Element Chromium.
  5. Chromium. (n.d.). Chromium.
  6. Haynes, W. M. (Ed.). (2014, June 4). CRC Handbook of Chemistry and Physics.
  7. Kaye, G W.C., & Laby, T H. Tables of physical and chemical constants. 15th Edition. United States.
  8. Sansonetti, J. E., & Martin, W. C. (2005, December). Handbook of Basic Atomic Spectroscopic Data. Journal of Physical and Chemical Reference Data, 34(4), 1559–2259.
  9. Bondi, A. (1964, March). van der Waals Volumes and Radii. The Journal of Physical Chemistry, 68(3), 441–451.
  10. Holden, et al. (2018, December 1). IUPAC Periodic Table of the Elements and Isotopes (IPTEI) for the Education Community (IUPAC Technical Report). Pure and Applied Chemistry, 90(12), 1833–2092.
  11. Emsley, J. (2011). Nature’s Building Blocks: An A-Z Guide to the Elements. United Kingdom: OUP Oxford.
  12. Allred, A. (1961, June). Electronegativity values from thermochemical data. Journal of Inorganic and Nuclear Chemistry, 17(3–4), 215–221.
  13. James A. M. & Lord M. P. (1992). Macmillan’s chemical and physical data. Macmillan.
  14. Zhang, Y., Evans, J. R. G., & Yang, S. (2011, January 11). Corrected Values for Boiling Points and Enthalpies of Vaporization of Elements in Handbooks. Journal of Chemical & Engineering Data, 56(2), 328–337.
  15. Possolo, A., van der Veen, A. M. H., Meija, J., & Hibbert, D. B. (2018, January 4). Interpreting and propagating the uncertainty of the standard atomic weights (IUPAC Technical Report). Pure and Applied Chemistry, 90(2), 395–424.

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