1. <span>low melting point
2. </span>positive <span>ion
3. </span><span>There are 2 bromine atoms for every magnesium atom.
4. </span><span>The name of the positive ion.
5. </span>Sodium sulfide<span>
6. </span><span>A covalent bond with 2 pairs of shared electrons.
7. </span>valence electrons<span />
That is Magnesium Chloride.
The answer is Letter C. It includes all bodies of water or what is left of it.