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)
- Chromium element in Periodic table
- Facts about Chromium
- Properties of Chromium
- Uses of Chromium
Chromium Element (Information Table)
The important data related to chromium element is given in the table below.
|Appearance of chromium||Silvery gray metallic appearance|
|Atomic number of chromium||24|
|Symbol of chromium||Cr|
|Atomic mass of chromium||51.996 u|
|Protons, Neutrons & Electrons in chromium||Protons: 24, Neutrons: 28, Electrons: 24|
|State of chromium (at STP)||Solid|
|Group number of chromium in periodic table||6|
|Period number of chromium in periodic table||4|
|Block of chromium in periodic table||d-block|
|Category of chromium||Transition metals|
|Bohr model or Electrons per shell or Electrons arrangement in chromium||2, 8, 13, 1|
|Electron configuration of chromium||[Ar] 3d5 4s1|
|Orbital diagram of chromium|
|Electronegativity of chromium (on pauling scale)||1.66|
|Atomic radius of chromium (van der Waals radius)||189 picometers|
|Density of chromium||7.19 g/cm3|
|1st ionization energy of chromium||6.767 eV|
|Main isotope of chromium||52Cr|
|Melting point of chromium||2180 K or 1907 °C or 3465 °F|
|Boiling point of chromium||2944 K or 2671 °C or 4840 °F|
|Crystal structure of chromium||Body Centered Cubic (BCC)|
|Discovery of chromium||By 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.
Facts about chromium
Here are a few interesting facts about chromium element.
- The name “Chromium” came from the Greek word “chroma”, which means color.
- Chromium is the 3rd hardest element found on the entire periodic table (first is carbon (diamond) and second is boron).
- Chromium is the 21st most abundant element present in the earth’s crust.
- Chromite is the ore from which the majority of chromium is obtained.
- Earth’s crust has around 100 ppm concentration of chromium element.
- The leading producer of chromium in the entire world is South Africa.
- 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.