Question

12. Magnesium bromide is a compound with the chemical formula MgBr2. What does the "2" tell you?
There are two bromine atoms for every magnesium atom
There are two magnesium and two bromine atoms
There are two bromide atom for every magnesium atom
There are two magnesium atoms to every bromide atom.

Answer 1

Answer:

(a) There are two bromide ions for every magnesium ion

Explanation:

De composition of the MgBr2 we will get the equation

MgBr2=Mg+2 + 2Br-

Answer 2

There are two bromide ions for every magnesium ion because Magnesium has the capability to lose two electrons whereas bromine can take only 1 electron to attain octet therefore two bromide ions take one electron each