6. what charge is an electron?
- 2 decibels=2
- negative=-1
- neutral=0
- positive=+1
7. what charge is a neutron?
- neutral=0
- positive=+1
- negative=-1
- 2 decibles=2
8. what does each group[a vertical column] contain?
- elements with similar properties
- elements with 12 protons
- elements
- elements with different properties
9. what is the nucleus of an atom made of?
- protons and neutrons
- sodium and oxygen
- protons and electrons
- neutrons and electrons
