Across
- 2. periodic table of...
- 3. the basic particles of the chemical elements
- 7. a group of two or more atoms held together by attractive forces
- 9. the emission or transmission of energy in the form of waves or particles through space
- 10. a subatomic particle with a positive electrical charge
- 11. subatomic particles found inside the nucleus of every atom
- 13. the structure in a cell that contains the chromosomes
- 14. the smallest particle of a chemical element that can exist
Down
- 1. distinct nuclear species of the same chemical element.
- 4. two or more different elements joined together
- 5. a stable subatomic particle with a charge of negative electricity,
- 6. lots of different elements
- 8. a stable subatomic particle with a charge of negative electricity,
- 10. table elements
- 12. the process by which an unstable atomic nucleus loses energy by radiation. a group of two or more atoms held together by attractive forces