Across
- 2. a short-hand way to represent a molecule or a compound
- 3. starting substances in a chemical reaction
- 6. a substance that can be broken down into simpler substances by chemical nor physical methods
- 8. consists of 2 atoms chemically joined together
Down
- 1. combining power of an element
- 3. a group of atoms chemically combined together, having a valency
- 4. they cannot gain or lose electrons as they have valency 0
- 5. smallest particle of a substance which can have its own characteristic properties
- 7. has symbol "S" and valency 2,4 or 6