Across
- 1. substances taking part in a chemical reaction
- 7. smallest particle of an element.
- 9. the insoluble solid formed in a chemical reaction when two solutions are mixed.
- 10. number of protons and neutrons are together called.
Down
- 2. the symbol is Na,
- 3. subatomic particle without any charge.
- 4. the metal whose symbol is Ca
- 5. horizontal rows in the periodic family
- 6. combining capacity of elements
- 8. family to which chlorine, bromine and iodine belong