Across
- 3. pure substance that consists entirely of one type of atom
- 5. negatively charged particle; located in the space surrounding the nucleus
- 8. in cells, structure that contains the cell's genetic material in the form of DNA
- 11. substance formed by the chemical combination of two or more elements in definite proportions
Down
- 1. one of several forms of a single element, Which contains the same number of protons but different numbers of neutrons
- 2. slight attraction that develops between oppositely charged regions of nearby molecules
- 4. atom that has a positve or negative charge
- 6. between atoms in which the electrons are shared
- 7. the smallest unit of most compounds that displays all the properties of that compound
- 9. basic unit of matter
- 10. chemical bond form when one or more electrons are transferred from one to another