Which is NOT a part of the nucleus of an atom?
The smallest form of matter that still has the properties of a specific element.
Positively charged particles of an atom.
Negatively charged particles of an atom.
Particles of an atom with no charge (neutral).
Who discovered the electron?
Who determined that electrons rotate around a nucleus?
Who discovered that electrons are found in different energy levels or shells?
The model we use today is the .....
Protons + Neutrons =
Number of protons
An isotope of an element has the same number of protons, but different numbers of _____________
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