Parts of an Atom (study guide)
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How many electrons can be held in the first orbital? (closest to the nucleus)
2
How many electrons can be held on the second orbital?
8
How many electrons can be held on the third orbital?
8 or 18
What part of an atom has a negative charge?
Electron
What part of the atom has no charge?
Neutron
What part of the atom has a positive charge?
Proton
The atomic number is the same as the number of these particles.
Protons
There are the same number of these two particles in an atom.
Protons and Electrons
The mass number is determined by which particles?
Protons and Neutrons
