Difference between revisions of "Group 1"
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: The '''Alkali Metals''' have similar [[Chemical Property|chemical properties]] because they all have one [[electron]] on their [[Outer Shell|outer shell]]. | : The '''Alkali Metals''' have similar [[Chemical Property|chemical properties]] because they all have one [[electron]] on their [[Outer Shell|outer shell]]. | ||
: '''Alkali Metals''' all produce [[ion]]s with a +1 [[Relative Atomic Charge|relative charge]] because they lose an [[electron]] in [[Chemical Reaction|chemical reactions]]. | : '''Alkali Metals''' all produce [[ion]]s with a +1 [[Relative Atomic Charge|relative charge]] because they lose an [[electron]] in [[Chemical Reaction|chemical reactions]]. | ||
+ | The '''Alkali Metals''' in order from least [[reactivity|reactive]] to most [[reactivity|reactive]] are: | ||
+ | *[[Lithium]] (Li) | ||
+ | *[[Sodium]] (Na) | ||
+ | *[[Potassium]] (K) | ||
+ | *[[Rubidium]] (Rb) | ||
+ | *[[Caesium]] (Cs) | ||
+ | *[[Francium]] (Fr) | ||
===Chemical Properties=== | ===Chemical Properties=== |
Revision as of 15:24, 26 November 2018
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.
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 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).