Across
- 4. radiant energy given of by the sun
- 6. member of the family of elements composed of very reactive, colored, non-metals
- 8. a substance that has a PH level higher than 7 when it's in aqueous solution
- 9. a subatomic particle that has a negative charge (-1)
- 10. starting substance in a chemical reaction
Down
- 1. a compound made from carbon and hydrogen
- 2. a subatomic particle that has a positive charge (+1)
- 3. a group of atoms usually of different elements that act as one single ion
- 5. a substance that has a PH level lower than 7 when it's in aqueous solution
- 7. a substance that can't be broken down into any simpler substances by chemical means