Curium element (Cm) is in period 7 of a periodic table. Curium is in the f-block and it is classified as an actinide on the periodic table.
There is a lot more information related to curium which is mentioned in the Information Table given below.
So let’s dive right into it!
Table of contents
- Curium element (Information Table)
- Curium element in Periodic table
- Facts about Curium
- Properties of Curium
- Uses of Curium
Curium Element (Information Table)
The important data related to curium element is given in the table below.
|Appearance of curium||Silvery white metallic appearance|
|Atomic number of curium||96|
|Symbol of curium||Cm|
|Atomic mass of curium (most stable isotope)||247 u|
|Protons, Neutrons & Electrons in curium||Protons: 96, Neutrons: 151, Electrons: 96|
|State of curium (at STP)||Solid|
|Period number of curium in periodic table||7|
|Block of curium in periodic table||f-block|
|Category of curium||Inner transition metals|
|Bohr model or Electrons per shell or Electrons arrangement in curium||2, 8, 18, 32, 25, 9, 2|
|Electron configuration of curium||[Rn] 5f7 6d1 7s2|
|Orbital diagram of curium|
|Electronegativity of curium (on pauling scale)||1.3|
|Atomic radius of curium (van der Waals radius)||245 picometers|
|Density of curium||13.51 g/cm3|
|1st ionization energy of curium||6.02 eV|
|Main isotopes of curium||243Cm and 248Cm|
|Melting point of curium||1613 K or 1340 °C or 2444 °F|
|Boiling point of curium||3383 K or 3110 °C or 5630 °F|
|Crystal structure of curium||Double Hexagonal Close Packed|
|Discovery of curium||By Glenn T. Seaborg, Albert Ghiorso and Ralph A. James (in 1944)|
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).
Curium element in Periodic table
The Curium element (Cm) has the atomic number 96 and is located in period 7. Curium 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 curium
Here are a few interesting facts about the curium element.
- Glenn T. Seaborg, Albert Ghiorso and Ralph A. James discovered curium in the year 1944.
- Curium was given its name after the names of chemists Marie Curie and Pierre Curie.
- Curium is naturally found from uranium containing ores, but it is also artificially prepared in the lab.
- There are around 19 isotopes of curium and all these isotopes are radioactive in nature.
- 247Cm is the most stable isotope of curium and it has a half life of 15.6 million years.
Properties of curium
Here is a list of some physical properties and chemical properties of curium.
Physical properties of curium
- Curium has a silvery white metallic appearance.
- The density of curium is 13.51 g/cm3 and the predicted atomic mass of most stable isotope is 247 amu.
- Curium has a double hexagonal close packed crystal structure at room temperature. But this changes to FCC at higher temperatures.
- The melting point of curium is 1613 K and its boiling point is estimated to be 3383 K respectively.
Chemical properties of curium
- Curium forms an oxide layer on it when it is kept open in the air.
- Curium is a radioactive and harmful element.
- Curium has +4 oxidation state in its solid compounds, and it has +3 oxidation state when it is in solution.
Uses of curium
Here are some uses of the curium element.
- Curium is mostly used in research work due to its radioactive nature.
- The isotope 244Cm is used in X-ray spectrometers, which can be used to measure the quantity of elements present in the rocks of Mars.
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- It’s Elemental – The Element Curium. (n.d.). It’s Elemental – the Element Curium. https://education.jlab.org/itselemental/ele096.html
- P. (n.d.). Curium | Cm (Element) – PubChem. Curium | Cm (Element) – PubChem. https://pubchem.ncbi.nlm.nih.gov/element/Curium
- Curium – Wikipedia. (2008, December 7). Curium – Wikipedia. https://en.wikipedia.org/wiki/Curium
- Curium. (n.d.). Curium. https://www.cs.mcgill.ca/~rwest/wikispeedia/wpcd/wp/c/Curium.htm
- C&EN: IT’S ELEMENTAL: THE PERIODIC TABLE – CURIUM. (n.d.). C&EN: IT’S ELEMENTAL: THE PERIODIC TABLE – CURIUM. https://pubsapp.acs.org/cen/80th/curium.html?
- Periodic Table of Nottingham – University of Nottingham. (n.d.). Periodic Table of Nottingham – University of Nottingham. https://www.nottingham.ac.uk/periodicnottingham/curium
- 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
- 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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