How many electrons do they have on their outer shell?
1 which makes them very reactive and gives them similar properties.
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What are the alkali metals like?
Soft and low density
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What are the trends of alkali metals going down the group?
Increasing reactivity as the outer electron is more easily lost, and the attraction between the nucleus and electron decreases as electron is further away. They have lower melting and boiling point. They have higher relative atomic mass.
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How do alkali metals form ionic compounds with non metals?
Alkali metals don't need a lot of energy to lose their electron to form a full outer shell and quickly form 1+ions so they only ever react to form ionic compounds. They are usually white solids that dissolve in water to form colourless solutions.
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How do alkalis react when put into water?
Very vigorously
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What do alkalis form and produce when they react with water?
They form hydrogen, the amount of energy given out when they react increases down the group but enough energy to catch hydrogen. They also form hydroxides that dissolve in water to give alkaine solutions.
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