Properties of the halogens
The elements in group 7 of the periodic table are referred to as the halogens. But what do you need to know about these elements and the way they behave? Halogen molecules are made of two atoms; halogens at the top of the periodic table are gases and ones at the bottom are solid; halogens produce coloured vapours; and when they react with hydrogen they produce acids. How do you remember this? Read on!
1. Molecular structure
2. States of the Halogens
3. Coloured vapours
5. React with hydrogen to make acids
- 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 solids 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).