Across
- 2. a pure substance made of only one kind of atom
- 5. The smallest part of an element that still has the same properties as the element
- 6. the central part of the atom where protons and neutrons are located
- 8. uses dots to represent valence electrons around an elements atomic symbol
Down
- 1. particles of no charge located in the nucleus of an atom
- 3. electrons on the outermost energy level of a atom
- 4. a charged atom due to loss or gain of negative electrons
- 7. atom of the same element that have different numbers of neutrons