Across
- 3. a pure substance that consists entirely of one type of atom
- 5. a negatively charged particle
- 8. the center of the atom
- 11. a substance formed by the chemical combination of two or more elements in definite proportions
Down
- 1. atoms of the same element that differ in the number of neutrons they contain
- 2. a weak attraction that develops between oppositely charged regions of nearby molecules
- 4. an atom that has a positive or negative charge
- 6. type of bond between atoms in which the electrons are shared
- 7. smallest unit of most compounds that displays all the properties of that compound
- 9. the basic unit of matter
- 10. formed when one or more electrons are electrons are transferred from one atom to another