How many elements and how many atoms are in MgCI2

two elements and three atoms

Explanation:

An element is the simplest substance and hence cannot be broken down using chemical reactions.

Magnesium chloride is an ionic compound formed by the transfer of electrons from element magnesium (Mg) to element chlorine (Cl) where Magmesium forms a cation by losing two electrons and chlorine forms an anion by gaining electron.

There are 3 atoms in Magnesium chloride which include one atom of magnesium (Mg) and two atoms of chlorine (Cl).

i think its 5049.

i hope this !