Answer:
2 electrons
Explanation:
Oxygen has 6 valence electrons and to be stable it needs 8. That means it needs 2 more electrons to have a full octet.
B. When electrons gain energy, they have the power to move up to a higher energy level in an atom.
Atoms of the same element with different mass numbers are called isotopes
Answer:
Non-polar and non-polar molecules do not attract each other.
Explanation:
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