6. Isotopes have a varying number of...
- electrons
- neutrons
- protons
7. which of these is incorrect
- protons have a positive charge
- electrons have a negative charge
- neutrons have a negative charge
- neutrons have a neutral (no)charge
8. Similar Elements are in...
- vertical columns in the periodic table
- horizontal rows in the periodic table
9. number of protons = number of neutrons
- False
- True
10. number of protons = number of electrons
- True
- False
