Contents
Key Stage 4
Meaning
Group 1 elements, also known as Alkali Metals on the Periodic Table are the elements which have only one electron in their outer shell.
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| Group 1 elements are shown in light purple at the far left of the Periodic Table. |
About the Alkali Metals
- The Alkali Metals have similar chemical properties because they all have one electron on their outer shell.
- Alkali Metals all produce ions with a +1 relative charge because they lose an electron in chemical reactions.
The Alkali Metals in order from least reactive to most reactive are:
Chemical Properties
- Alkali Metals are all highly reactive and will oxidise quickly in the presence of Oxygen.
- Alkali Metals all react strongly with water to produce metal hydroxides and Hydrogen gas.
- Alkali Metals all produce strong alkalis.
Physical Properties
- Alkali Metals have a low density compared to other metals.
- Alkali Metals are all solid at room temperature but have a low melting point compared to other metals.
- Alkali Metals are soft and can be easily cut.
- Alkali Metals all appear shiny (before they oxidise).