Answer:
Atoms.
They come together so they can form molecules (because of their electrons)
It becomes a covalent bond
Explanation:
So that it follows the law of conservation of mass
False. A physical change does not create a new substance.
Ca3N2 is your answer<span> </span>
Remember the acronym "Oil Rig". Oxidation is loss, Reduction is gain of electrons. Calcium is losing electrons so it's an oxidation reaction.
