An atom of an element with two valence electrons reacts with two atoms of an element with atomic number 17 to form an ionic compound. what is the compound most likely formed as described?

B.) MgCl2

Explanation:

The element with atomic number 17 has 7 valence electrons. It needs 1 electron to attain a stable electronic configuration. So, two atoms of this element will form ionic bonds with one atom of the element with two valence electrons. The compound that fits the description perfectly is MgCl2

It is MgCl2