Fermium (Fm) – Periodic Table [Element Information & More]

fermium element periodic table

Fermium element (Fm) is in period 7 of a periodic table. Fermium is in the f-block and it is classified as an actinide on the periodic table.

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

So let’s dive right into it!

Table of contents

Fermium Element (Information Table)

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

Atomic number of fermium100
Symbol of fermiumFm
Atomic mass of fermium (most stable isotope)257 u
Protons, Neutrons & Electrons in fermiumProtons: 100, Neutrons: 157, Electrons: 100
State of fermium (at STP)Solid (predicted)
Period number of fermium in periodic table7
Block of fermium in periodic tablef-block
Category of fermiumInner transition metals
Bohr model or Electrons per shell or Electrons arrangement in fermium2, 8, 18, 32, 30, 8, 2
Electron configuration of fermium[Rn] 5f12 7s2
Orbital diagram of fermiumorbital diagram of fermium
Electronegativity of fermium (on pauling scale)1.3
Density of fermium (predicted)9.7 g/cm3
1st ionization energy of fermium6.50 eV
Main isotope of fermium257Fm
Melting point of fermium (predicted)1800 K or 1527 °C or 2781 °F
Crystal structure of fermiumFace Centered Cubic (FCC)
Discovery of fermiumBy Albert Ghiorso and his team (in 1952)

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).

Fermium element in Periodic table

The Fermium element (Fm) has the atomic number 100 and is located in period 7. Fermium is a metal and it is classified as an actinide group element.

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

Facts about fermium

Here are a few interesting facts about fermium element.

  1. Fermium element was identified by Albert Ghiorso and his team (in 1952) at Lawrence Berkeley National Laboratory.
  2. Fermium was given its name to honor the physicist Enrico Fermi.
  3. Fermium is a radioactive element which is prepared in a nuclear reactor and it is not available naturally.
  4. There are around 20 isotopes of fermium and these are all radioactive in nature.
  5. 257Fm is the isotope of fermium which has a longest half-life (only 100 days).

Properties of fermium

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

Physical properties of fermium

  • Fermium has a FCC crystal structure (predicted).
  • The predicted density of fermium is 9.7 g/cm3 and the most stable isotope of fermium has an atomic mass of 257 amu.
  • It has been found through ca;culations that the melting point of fermium is 1800 K.

Chemical properties of fermium

  • Fermium is a radioactive and toxic element.
  • The most common oxidation state of fermium is +3.
  • The electronic configuration of fermium ([Rn] 5f12 7s2) indicates that the last electron enters the f-orbital and hence it is f-block element on the periodic table.

Uses of fermium

Fermium has no commercial uses because of its radioactive nature, and it is generally used for research work.

External resources:

  1. Fermium – Element information, properties and uses | Periodic Table. (n.d.). Fermium – Element Information, Properties and Uses | Periodic Table. https://www.rsc.org/periodic-table/element/100/fermium
  2. Fermium – Wikipedia. (2007, December 7). Fermium – Wikipedia. https://en.wikipedia.org/wiki/Fermium
  3. It’s Elemental – The Element Fermium. (n.d.). It’s Elemental – the Element Fermium. https://education.jlab.org/itselemental/ele100.html
  4. P. (n.d.). Fermium | Fm (Element) – PubChem. Fermium | Fm (Element) – PubChem. https://pubchem.ncbi.nlm.nih.gov/element/Fermium
  5. Periodic Table of Elements: Los Alamos National Laboratory. (n.d.). Periodic Table of Elements: Los Alamos National Laboratory. https://periodic.lanl.gov/100.shtml
  6. Periodic Table of Nottingham – University of Nottingham. (n.d.). Periodic Table of Nottingham – University of Nottingham. https://www.nottingham.ac.uk/periodicnottingham/fermium
  7. Thornton, B. F., & Burdette, S. C. (2017, June 23). Frantically forging fermium. Nature Chemistry, 9(7), 724–724. https://doi.org/10.1038/nchem.2806
  8. 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. https://doi.org/10.1515/pac-2016-0402
  9. Emsley, J. (2011). Nature’s Building Blocks: An A-Z Guide to the Elements. United Kingdom: OUP Oxford.
  10. Haynes, W. M. (Ed.). (2014, June 4). CRC Handbook of Chemistry and Physics. https://doi.org/10.1201/b17118
  11. Electronic structure of the elements. (2000, March). The European Physical Journal C, 15(1–4), 78–79. https://doi.org/10.1007/bf02683401

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