Francium element (Fr) is in group 1 and period 7 of a periodic table. Francium is in the s-block and it is classified as an alkali metal on the periodic table.
There is a lot more information related to francium which is mentioned in the Information Table given below.
So let’s dive right into it!
Table of contents
- Francium element (Information Table)
- Francium element in Periodic table
- Facts about Francium
- Properties of Francium
- Uses of Francium
Francium Element (Information Table)
The important data related to francium element is given in the table below.
|Atomic number of francium||87|
|Symbol of francium||Fr|
|Atomic mass of francium (most stable isotope)||223 u|
|Protons, Neutrons & Electrons in francium||Protons: 87, Neutrons: 136, Electrons: 87|
|State of francium (at STP)||Solid|
|Group number of francium in periodic table||1|
|Period number of francium in periodic table||7|
|Block of francium in periodic table||s-block|
|Category of francium||Alkali metal|
|Bohr model or Electrons per shell or Electrons arrangement in francium||2, 8, 18, 32, 18, 8, 1|
|Electron configuration of francium||[Rn] 7s1|
|Orbital diagram of francium|
|Valence electron in francium||1|
|Electronegativity of francium (on pauling scale)||0.7|
|Atomic radius of francium (van der Waals radius)||348 picometers|
|Density of francium||2.48 g/cm3|
|1st ionization energy of francium||3.9 eV|
|Main isotope of francium||123Fr|
|Melting point of francium||300 K or 27 °C or 81 °F|
|Boiling point of francium||950 K or 677 °C or 1251 °F|
|Crystal structure of francium||Body Centered Cubic (BCC)|
|Discovery of francium||By Marguerite Perey in 1939|
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).
Francium element in Periodic table
The Francium element (Fr) has the atomic number 87 and is located in group 1 and period 7. Francium is in solid state at STP and it is classified as an alkali metal on the periodic table.
Click on above elements in the periodic table to see their information.
Facts about francium
Here are a few interesting facts about francium.
- Francium was discovered from France (Paris), hence it is named Francium.
- Marguerite Perey discovered francium in the year 1939.
- Francium is the 2nd rarest element present in the earth’s crust (the rarest element in earth’s crust is astatine).
- Francium is considered as the most reactive alkali metal.
Properties of francium
Here is a list of some physical properties and chemical properties of francium.
Physical properties of francium
- Francium has a very low melting point (27 °C). The francium metal melts down in the warm room.
- It has been predicted from extrapolation methods that francium has a BCC crystal structure.
- The estimated density of francium is 2.48 g/cm3 and its atomic mass is 223 amu.
- The half life of the most stable isotope of francium is 22 minutes only.
Chemical properties of francium
- Francium has the least electronegativity out of all the elements on the periodic table.
- Francium reacts with water and also gives out hydrogen gas during this reaction. And it also catches fire during this reaction. (As francium is very rare in availability, it is not possible to see this reaction practically).
- The most common oxidation state of francium is +1, as it has 1 valence electron.
Uses of francium
Francium is radioactive as well as it is available in very rare amounts. Hence it has no practical applications. Francium is generally used for research work.
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- Emsley, J. (2011). Nature’s Building Blocks: An A-Z Guide to the Elements. United Kingdom: OUP Oxford.
- Haynes, W. M. (Ed.). (2014, June 4). CRC Handbook of Chemistry and Physics. https://doi.org/10.1201/b17118
- Electronic structure of the elements. (2000, March). The European Physical Journal C, 15(1–4), 78–79. https://doi.org/10.1007/bf02683401
- James A. M. & Lord M. P. (1992). Macmillan’s chemical and physical data. Macmillan.
- 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. https://doi.org/10.1088/0026-1394/33/2/3
- Allred, A. (1961, June). Electronegativity values from thermochemical data. Journal of Inorganic and Nuclear Chemistry, 17(3–4), 215–221. https://doi.org/10.1016/0022-1902(61)80142-5
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