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Atoms of most elements are more stable when they have how many valence electrons?
8, (or basically a complete outer shell, for example helium).
Atoms usually react in a way that makes them more stable by either doing what?
Gaining electrons, or Losing electrons.
Atoms that lose or gain electrons can become chemically combined to other atoms through what?
Through a chemical bond.
-The Interaction (losing, gaining, or sharing) of valence electrons.
What is a chemical bond?
The force of attraction that hold two atoms together as a result of the rearrangement of electrons between them.
How do electrons get shared?
When atoms bonds, electrons may be transferred from one atom to another.
What are Polyatomic ions?
Ions that are made of more than one atom (ex. carbonate CO3-2 is made up of carbon and oxygen atoms); they act as a single unit and have an overall charge.
What happens when a positive and a negative ion come together they form what?
They form an ionic compound (this attraction between two oppositely charged ions is an ionic bond).
What do the elements in a single group on the periodic table have in common?
The number of valence electrons.
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