Mammoth Memory

Reactivity of halogens and alkali metals

As you go down group 1 (the alkali metals) in the periodic table, the elements get more reactive.

As you go up group 7 (the halogens), again, the elements become more reactive.

In the halogen group the more reactive elements are at the top where in alkaline metals group are displayed at the bottom

To remember how the reactivity of the alkali metals and halogens increases or decreases, put a pin in the middle of the periodic table and spin it anti-clockwise.

Drunks fall down, angels rise.



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