Cadmium (Cd) – Periodic Table [Element Information & More]

cadmium element periodic table

Cadmium element (Cd) is in group 12 and period 5 of a periodic table. Cadmium is in the d-block and it is classified as a post-transition element on the periodic table.

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

So let’s dive right into it!

Table of contents

Cadmium Element (Information Table)

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

Appearance of cadmiumMetallic bluish-gray
Atomic number of cadmium48
Symbol of cadmiumCd
Atomic mass of cadmium112.41 u
Protons, Neutrons & Electrons in cadmiumProtons: 48, Neutrons: 64, Electrons: 48
State of cadmium (at STP)Solid
Group number of cadmium in periodic table12
Period number of cadmium in periodic table5
Block of cadmium in periodic tabled-block
Category of cadmiumPost-transition metal
Bohr model or Electrons per shell or Electrons arrangement in cadmium2, 8, 18, 18, 2
Electron configuration of cadmium[Kr] 4d10 5s2
Orbital diagram of cadmiumorbital diagram of cadmium
Electronegativity of cadmium (on pauling scale)1.69
Atomic radius of cadmium (van der Waals radius)158 picometers
Density of cadmium8.65 g/cm3
1st ionization energy of cadmium8.994 eV
Main isotope of cadmium114Cd, 112Cd
Melting point of cadmium594.2 K or 321 °C or 610 °F
Boiling point of cadmium1040 K or 767 °C or 1413 °F
Crystal structure of cadmiumHexagonal closed packing (HCP)
Discovery of cadmiumBy Friedrich Stromeyer in 1817

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).

Cadmium element in Periodic table

The Cadmium element (Cd) has the atomic number 48 and is located in group 12 and period 5. Cadmium is a metal and it is classified as a post-transition element.

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

Facts about cadmium

Here are a few interesting facts about cadmium element.

  1. Cadmium was discovered by Friedrich Stromeyer in 1817.
  2. Cadmium is a soft metal and it can also be cut with a knife.
  3. Cadmium ores are not from the earth’s crust but it is obtained during the refining of zinc.
  4. It is estimated that the earth’s crust contains a very small concentration (0.150 ppm) of cadmium.
  5. If 1 ton of zinc is refined, then we can  get only 6.5 pounds of cadmium.

Properties of cadmium

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

Physical properties of cadmium

  • Cadmium has a shiny bluish-gray appearance.
  • Cadmium is a soft and malleable metal.
  • Cadmium is a good conductor of heat and electricity.
  • The melting point and boiling point of cadmium is 594.2 K and 1040 K.

Chemical properties of cadmium

  • The cadmium has a most common oxidation state of +2.
  • The electronic configuration of cadmium is [Kr] 4d10 5s2 and it is classified as a post-transition metal on the periodic table.
  • Cadmium is resistive to corrosion so it is also used in plating other metals.
  • The bulk cadmium metal is not flammable but its powdered form may burn and release toxic fumes.
  • The cadmium metal pieces are insoluble in water.
  • When cadmium is heated in air, it forms cadmium oxide (CdO).

Uses of cadmium

Here are some uses of the cadmium element.

  • Cadmium is mostly used in rechargeable nickel-cadmium batteries.
  • Cadmium is used in anti-corrosion plating on the steel.
  • Cadmium rods are used as a neutron absorber in nuclear reactors.
  • Cadmium is also used in some semiconductor materials.
  • Different cadmium salts are used in paint pigments to get different colors (mostly red, yellow and orange).

External resources:

  1. Chemistry of Cadmium. (2013, October 2). Chemistry LibreTexts.
  2. Bedford, et al. (1996, April 1). Recommended values of temperature on the International Temperature Scale of 1990 for a selected set of secondary reference points. Metrologia, 33(2), 133–154.
  3. Allred, A. (1961, June). Electronegativity values from thermochemical data. Journal of Inorganic and Nuclear Chemistry, 17(3–4), 215–221.
  4. Possolo, et al. (2018, January 4). Interpreting and propagating the uncertainty of the standard atomic weights (IUPAC Technical Report). Pure and Applied Chemistry, 90(2), 395–424.
  5. Emsley, J. (2011). Nature’s Building Blocks: An A-Z Guide to the Elements. United Kingdom: OUP Oxford.
  6. Haynes, W. M. (Ed.). (2014, June 4). CRC Handbook of Chemistry and Physics.
  7. Cadmium – Element information, properties and uses | Periodic Table. (n.d.). Cadmium – Element Information, Properties and Uses | Periodic Table.
  8. Cadmium – Wikipedia. (2021, November 25). Cadmium – Wikipedia.
  9. P. (n.d.). Cadmium | Cd (Element) – PubChem. Cadmium | Cd (Element) – PubChem.
  10. It’s Elemental – The Element Cadmium. (n.d.). It’s Elemental – the Element Cadmium.
  11. Electronic structure of the elements. (2000, March). The European Physical Journal C, 15(1–4), 78–79.
  12. James A. M. & Lord M. P. (1992). Macmillan’s chemical and physical data. Macmillan.
  13. Periodic Table of Elements: Los Alamos National Laboratory. (n.d.). Periodic Table of Elements: Los Alamos National Laboratory.
  14. Atomic Weight of Cadmium | Commission on Isotopic Abundances and Atomic Weights. (n.d.). Atomic Weight of Cadmium | Commission on Isotopic Abundances and Atomic Weights.
  15. Atomic Data for Cadmium (Cd). (n.d.). Atomic Data for Cadmium (Cd).
  16. Cadmium Statistics and Information | U.S. Geological Survey. (n.d.). Cadmium Statistics and Information | U.S. Geological Survey.

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