Atoms and Molecules

Question Answer
Which particle in an atom has a positive charge? The Proton
Which particle in an atom has no charge? The Neutron
Which particle in an atom has a negative charge? The Electron
Where is most of the mass of an atom found? In the Nucleus
The _________is the number of protons in the nucleus of an atom of an element. Atomic Number
You can identify an element if you know its atomic number or _______. Proton Number
In the periodic table, the atomic number of an element is the _________ above its symbol. Number of Protons
What do atoms become if any electrons are gained or lost? Ions

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