Across
- 4. Electrons have _____ charge
- 6. Rows 3-11 on the periodic table are all _____ metals
- 8. protons & neutrons are located in the ______ of an atom
- 10. protons have a _____ charge
- 11. The first row on the periodic table is _____ metals
Down
- 1. #1 on the periodic table
- 2. ______ electrons in the outermost energy level of an atom
- 3. Neutrons have a ______ charge
- 5. weight average mass of the naturally occurring isotopes of an atom
- 7. The atomic mass number is the number of protons + ______
- 9. The # of _____ for a given atom never changes