Difference between revisions of "Radium"
| Line 29: | Line 29: | ||
: The most [[Stable Isotope|stable isotope]] of [[Radium]] has 138 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Relative Atomic Mass|atomic mass]] of 226. | : The most [[Stable Isotope|stable isotope]] of [[Radium]] has 138 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Relative Atomic Mass|atomic mass]] of 226. | ||
: An [[atom]] of [[Radium]] has only 2 [[electron]]s in its [[Outer Shell|outer shell]]. | : An [[atom]] of [[Radium]] has only 2 [[electron]]s in its [[Outer Shell|outer shell]]. | ||
| − | : [[Radium]] [[ion]]s have lost two [[electron]]s to become [[Positive | + | : [[Radium]] [[ion]]s have lost two [[electron]]s to become [[Positive Charge|positively charged]]. |
====Properties==== | ====Properties==== | ||
: [[Radium]] is the most [[Reactivity|reactive]] [[Alkali Earth Metal|alkali earth metal]]. | : [[Radium]] is the most [[Reactivity|reactive]] [[Alkali Earth Metal|alkali earth metal]]. | ||
Revision as of 09:47, 3 April 2019
Contents
Key Stage 2
Meaning
Key Stage 3
Meaning
Radium is a Group 2 element, on the Periodic Table, with an atomic number of 88.
About Radium
Molecular Structure
- Radium has the chemical formula Ra.
- Radium atoms join together in large numbers to form a giant metal molecule.
Atomic Structure
- Radium as 88 protons and 138 neutrons in its nucleus giving it an Atomic Number of 88 and an atomic mass of 226.
- An atom of Radium has only 2 electrons in its outer shell.
Properties
- Radium is the most reactive alkali earth metal.
- 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.
Key Stage 4
Meaning
Radium is a Group 2 element, on the Periodic Table, with 88 protons in the nucleus.
About Radium
Molecular Structure
- Radium has the chemical formula Ra.
- Radium atoms join together in a giant metallic structure.
Atomic Structure
- The most stable isotope of Radium has 138 neutrons in its nucleus giving it an atomic mass of 226.
- An atom of Radium has only 2 electrons in its outer shell.
- Radium ions have lost two electrons to become positively charged.
Properties
- Radium is the most reactive alkali earth metal.
- 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.