Across
- 4. – Ancient philosopher who suggested matter is made of atoms.
- 7. - A smelly, green poisonous element.
- 11. - Shiny, silver-coloured metal that fizzes in water
- 13. – A substance made from different elements chemically bonded.
- 14. – Physical or chemical characteristics of a substance.
- 16. – A chart that organises all known elements. (8,5)
Down
- 1. – Latin name for gold.
- 2. – A molecule consisting of two atoms like the oxygen molecule.
- 3. – A very small part of matter.
- 5. – One or two letters representing an element. (8,6)
- 6. – A substance made of only one type of atom.
- 8. – Two or more atoms joined together.
- 9. – A metallic element with the Latin name ferrum and the symbol Fe.
- 10. – A flammable gas that makes up two-thirds of the atoms in a water molecule.
- 12. – The smallest unit of an element.
- 15. – Describes gases made of single atoms, like helium.