Across
- 3. number of protons that it has in its nucleus
- 6. the common name given to the elements in group I
- 7. chemical symbol of the element phosphorus
- 8. A bond consisting of shared pairs of electrons
Down
- 1. a substance found to contain only one type of atom
- 2. Chlorine, bromine and fluorine
- 4. Is made up of two or more elements chemically joined together
- 5. halogen used in household bleach