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Preview questions
1. What is the charge of an electron?
Positive · Negative · Neutral · Variable
2. Who proposed the planetary model of the atom?
Niels Bohr · Erwin Schrödinger · J.J. Thomson · John Dalton
3. What is the mass of a proton approximately?
1 amu · 0.5 amu · 1/1836 amu · 0 amu
4. Which particle is found in the nucleus of an atom?
Electron · Neutron · Proton · Both Neutron and Proton
5. What determines the atomic number of an element?
Number of neutrons · Number of electrons · Number of protons · Number of nucleons
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