Mammoth Memory

Properties of the halogens

1.    Molecular structure

Halogen molecules contain 2 atoms

The halo brigade always consists of one hero and one sidekick. There are always two.

Halogen molecules always have 2 atoms.



2.    States of the Halogens

In the halogen group gasses are at the top and solids at the bottom

They protect the air in the sky above and the solid ground below.

Gases at the top of their column of the periodic table, solids are at the bottom.



3.    Coloured vapours

Halogens all have coloured vapours

When danger threatens, the halo brigade flies up to deal with it. As they fly, they leave coloured trails behind them.

Halogens all have coloured vapours.



4.    Displacement

Halogens higher up the table displace ones at a lower position

The more powerful hero angel wants a piece of the action first, so she shoves her less powerful sidekick out of the way. (Displacement)

Halogens higher up in the table displace the ones that are lower in the table.



5.    React with hydrogen to make acids

When halogens react with hydrogen it makes poisonous acids

The threat is quite often a high dragon (hydrogen). When the two of them fight, the wounded dragon spills poisonous, acid blood.

Halogens react with hydrogen to make poisonous acids.



To recap:

  • A halo brigade always has two members (halogens always have two atoms)
  • They protect the sky above and solid ground below (they are gases at the top of the periodic table and solid at the bottom)
  • They leave coloured trails when they fly (they all have coloured vapours)
  • The hero angel shoves the sidekick angel out of the way (halogens higher on the table displace the ones that are lower on the table)
  • When the angel fights the dragon, she spills its poisonous, acid blood (Halogens react with hydrogen to make poisonous acids).
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