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1. What is the center of an atom called?
A
Proton
B
Nucleus
C
Electron
2. Which subatomic particle has a positive charge?
A
Neutron
B
Electron
C
Proton
3. What is the charge of an electron?
A
Negative
B
Neutral
C
Positive
4. Which subatomic particle has no charge?
A
Proton
B
Neutron
C
Electron