Radium
Contents
Key Stage 2
Key Stage 3
Meaning
File:RadiumSymbol.png
The chemical symbol for Radium.
Radium is a Group 2 element, on the Periodic Table, with an atomic number of 88.
About Radium
- Radium has the chemical formula Ra.
- Radium as 88 protons and 138 neutrons in its nucleus giving it an Atomic Number of 88 and an atomic mass of 226.
- Radium is a more reactive alkali earth metal than Strontium but less reactive than Radium.
- Radium is more reactive than Carbon on the reactivity series so it must be extracted from its ore using electrolysis.
- Radium reacts strongly with water to produce Hydrogen gas and Radium Hydroxide and strongly with acid to produce Radium salts.
- Radium is a solid at room temperature.
- An atom of Radium has only 2 electrons in its outer shell.
- Radium ions have lost 2 electrons to become positively charged.
Key Stage 4
Meaning
Radium is a Group 2 element, on the Periodic Table, with 88 protons in the nucleus.
About Radium
- Radium has the chemical formula Ra.
- The most stable isotope of Radium has 138 neutrons in its nucleus giving it an atomic mass of 226.
- Radium is a more reactive alkali earth metal than Strontium but less reactive than Radium.
- Radium is more reactive than Carbon on the reactivity series so it must be extracted from its ore using electrolysis.
- Radium reacts strongly with water to produce Hydrogen gas and Radium Hydroxide and strongly with acid to produce Radium salts.
- Radium is a solid at standard temperature and pressure.
- An atom of Radium has only 2 electrons in its outer shell.
- Radium ions have lost two electrons to become positively charged.