Across
- 6. A negative ion
- 7. A particle that can be negatively or positively charged
- 8. When two non-metal atoms share electrons
- 9. Two nitrogen joined together is an example
- 10. H2O is an example
Down
- 1. A positive ion
- 2. Water (H2O) is an example of this
- 3. A compound that consists of positively and negatively charged ions
- 4. Two or more atoms that have joined together in a unit
- 5. A substance that speeds up a chemical reaction but is not used up in the reaction