Across
- 2. A substance formed by a combination of elements in fixed proportions.
- 3. A chemical substance whose atoms all have the same number of protons.
- 4. A measure of a substance to transfer heat or electricity.
- 5. The mass of a single atom and is determined by the number of protons in the nucleus.
- 8. A system for categorising materiels based on how dangerous they may be.
- 9. A number used to classify elements which is equal to the number of protons in the nucleus of an atom of that element.
- 11. The types and ratios of atoms that make up a compound.
- 12. The ability of certain metals to retain their strength when the shape is changed.
- 13. The ability of a system to do work.
- 14. A way of representing chemical compounds using chemical symbols for for the elements as well as numbers to represent the number of each type of atom.
Down
- 1. A molecule formed from two atoms.
- 2. A unique on or two letter abbreviation for an element.
- 6. A nucleus containing protons and neutrons surrounded by moving electrons.
- 7. When a substance causes damage to the surface of a material via a chemical reaction.
- 10. A characteristic that can be observed or measured without changing the substance.