Answer:
I prob can bc I'm a bad b*tch
lol
You should read up on Proust's law, better known as the Law of Definite Proportions. This is a chemical law that defines your question more generally, on why the ratio of elements and ions are always fixed.
Basically, this compound Magnesium(II) Chloride is MgCl2 because it has the same number of protons, neutrons, and electrons all the way. This defines the properties of the compound or atom.
FLOOR. Most of the molecules that dont sick to something fall on the floor so most would be on the FLOOR.
The group of atoms held together by covalent bonds is called a molecule