6. What is the relative mass of an electron?
- -1
- 1/2000
- 1
- 100
7. What is the charge of an electron?
- +1
- 1
- -1
- 2
8. What is an element?
- A substance that is always chemically created
- A substance made up of one type of atom
- Two types of atoms not chemically bonded together
- Two types of atoms chemically bonded together
