Answer:
An atom
Explanation:
Because an ion is smaller than an atom and if we're talking about ions, iron would be called a Nitride ion or N3-ion, so ion come from atoms and saying that nitrogen is an atom.
There are two electrons in 4s and 6 in 3d. When you lose 3 electrons, you will be left with an ion of 3+ charge!
Answer: A. electrons are shared by many atoms and move freely
