Across
- 2. Mendeleev Designer of the periodic table of elements
- 3. 1 less electron than proton
- 6. levels- any of the possible energies an electron may have in an atom
- 7. number of protons
- 8. Large and heavy like protons, Neutrons have no electrical charge
- 9. An atom that carries an electrical charge
Down
- 1. 1 more electron than proton
- 4. Two atoms with different numbers of neutrons
- 5. Much larger and heavier than electrons, Protons have a positive charge(+)
- 6. Tiny, very light particles, Have a negative electrical charge (-)