Across
- 2. the number of protons in the nucleus of an atom
- 3. an abbreviation for the element's name
- 4. an interaction that holds atoms or ions together
- 6. forms between metal atoms when their outermost energy levels overlap
- 8. forms when atoms share one or more pairs of electrons
- 9. a force that brings oppositely charged ions together
Down
- 1. electrons found in the outermost energy level of an atom
- 5. the smallest particle into which an element can be divided and still be the same element
- 7. is a group of atoms held together by chemical bond
- 10. a particle with a positive or negative charge