All About Atoms
What happens when electrons move between shells?
They lose or gain energy
What happens during a chemical change?
Bonds between valence electrons are broken and rearranged.
How do atoms become stable?
By sharing or transferring valence electrons.
Why are valence electrons important?
What happens during an ionic bond?
Electrons are transferred between atoms, forming positive and negative ions.
What is an atom's stability based on?
How many valence electrons it has.
Why are noble gases almost never negative in chemical reactions?
They are stable.
Why can't scientists determine the exact location of electrons?
They don't have a definite position or direction.
Why are metals an example of positive ions?
They lose valence electrons when forming ions.