The Periodic Table/88 - Radium (Ra)

Element Radium (Ra, 88)

Here you can read more about the chemical element Radium. Its shemical symbol is Ra and its atomic number is 88. The relative atomic mass of Radium is 226 u. The elemental classification of Radium is Alkaline earth metals, and it belongs to group 2 and period 7 in the Periodic Table of Elements.

The density of Radium is 5000 kg/m3. And the mineral hardness of Radium is 1 Mohs. The melting point of Radium is 973 Kelvin (700 ℃). The boiling point of Radium is 2010 Kelvin (1737 ℃). Radium was discovered in the year 1898 by Pierre Curie and Marie Curie.

To the right (or below if you are using a mobile device with a smaller screen) you will find the information given above for the element Radium ordered in tabular form, which might be easier to read and use if you want to quantify it in some sort.

Data about element Radium

Chemical symbol
Element classification
Alkaline earth metals
Atomic number
Relativ atomic mass
Atomic mass
226 u
5000 kg/m3
Melting point
973 K   (700 ℃)
Boiling point
2010 K   (1737 ℃)
Mineral hardness
1 Mohs
Discovered year
Discovered by
Pierre Curie and Marie Curie