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The Nucleus is made up of what two components and account for the mass of an atom?
Protons and Neutrons
Because the periodic chart lists atoms in a "Neutral" state, the number of protons (positive charge) has to be equal to what ?
The number of Electrons
When is an atom most stable ?
When it has a full "outer shell" or "Orbital" ( Look for any of the nobel gases, which have 8 )
How many valence electrons go on the 2nd shell ?
Up to 8, must fill up first shell before putting any electrons onto the 2nd shell.
How many valence electrons go on the 3rd shell ?
Up to 8, must fill up first and second shell before putting any electrons onto the 3rd shell.
How do you figure out how many Neutrons are in an atom ?
Atomic Mass - Atomic # ( Protons ) = Neutrons
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