Atomic NumberAtomic Number of Radium
Atomic Number of Radium is 88.
Chemical symbol for Radium is Ra. Number of protons in Radium is 88. Atomic weight of Radium is 226 u or g/mol. Melting point of Radium is 700 °C and its the boiling point is 1140 °C.
» Boiling Point » Melting Point » Abundant » State at STP » Discovery YearAbout Radium
Radium is a soft radioactive metal of very light shiny silvery color. It was discovered at the very end of the 19th century by the Curie couple and named after the Latin word for ray. It is a toxic and dangerous chemical element which has no biological importance and cane cause serious damages to living organisms. Radium can be extracted from uranium ores and is mainly mined in Canada and Africa. It can also be produced in nuclear reactors. This chemical element can be found in luminous paints for clocks and watches. Its applications also include nuclear energy production and some medical treatments including prostate cancer treatment, etc.
Properties of Radium Element
| Atomic Number (Z) | 88 |
|---|---|
| Atomic Symbol | Ra |
| Group | 2 |
| Period | 7 |
| Atomic Weight | 226 u |
| Density | 5.5 g/cm3 |
| Melting Point (K) | 973 K |
| Melting Point (℃) | 700 °C |
| Boiling Point (K) | 2010 K |
| Boiling Point (℃) | 1140 °C |
| Heat Capacity | 0.094 J/g · K |
| Abundance | 9×10−7 mg/kg |
| State at STP | Solid |
| Occurrence | Transient |
| Description | Alkaline earth metal |
| Electronegativity (Pauling) χ | 0.9 |
| Ionization Energy (eV) | 5.2784 |
| Atomic Radius | 215pm |
| Covalent Radius | no datapm |
| Valence Electrons | 2 |
| Year of Discovery | 1898 |
| Discoverer | Marie and Pierre Curie |