Across
- 2. the ____________ table of elements
- 3. electrons have a ___________ charge
- 4. the gold foil experiment showed that atoms are mostly _______ space
- 7. electron location in atom
- 8. protons have a ______________ charge
- 9. negative ion
- 10. isotopes have different numbers of __________
- 11. matter takes up space and has ______
Down
- 1. charged particle
- 2. number of ______ determines an element's identity
- 3. the center of an atom
- 5. positive ion
- 6. a pure substance consisting of one type of atom
- 9. building blocks of matter