Across
- 3. sub atomic particle with no charge
- 4. an element that is likely to react with another element
- 6. atoms of the same element with a different number of neutrons
- 8. the unit of which activity is measured in
- 10. process of exposing an object to a source of radiation
- 12. when a substance has another mixed or disposed within it
- 14. most penetrating for of radiation
- 15. group 0 elements
Down
- 1. sub-atomic particle with a negative charge
- 2. household appliance that uses radiation
- 5. the cause an atom to become charged by gaining or losing an electron
- 7. the charge of an atom
- 9. sub-atomic particle with a positive charge
- 11. the most ionising type of radiation
- 13. number of counts from a sample per second