Atomic Number of Radium

Radium Atomic Number

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 Year

About 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 SymbolRa
Group2
Period7
Atomic Weight226 u
Density5.5 g/cm3
Melting Point (K)973 K
Melting Point (℃)700 °C
Boiling Point (K)2010 K
Boiling Point (℃)1140 °C
Heat Capacity0.094 J/g · K
Abundance9×10−7 mg/kg
State at STPSolid
OccurrenceTransient
DescriptionAlkaline earth metal
Electronegativity (Pauling) χ0.9
Ionization Energy (eV)5.2784
Atomic Radius215pm
Covalent Radiusno datapm
Valence Electrons2
Year of Discovery1898
DiscovererMarie and Pierre Curie

What is the Boiling Point of Radium?

Radium boiling point is 1140 °C. Boiling point of Radium in Kelvin is 2010 K.

What is the Melting Point of Radium?

Radium melting point is 700 °C. Melting point of Radium in Kelvin is 973 K.

How Abundant is Radium?

Abundant value of Radium is 9×10−7 mg/kg.

What is the State of Radium at Standard Temperature and Pressure (STP)?

State of Radium is Solid at standard temperature and pressure at 0℃ and one atmosphere pressure.

When was Radium Discovered?

Radium was discovered in 1898.


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