Magnesium is a 2+ metal, located in the alkaline earth metals group of the periodic table (group 2).
0.08 in the state of Pennsylvania. I imagine it is the same in all of the states though.
I think the answer would be D
PbH4 will be formed as a result of a polar covalent bond between the H and the Pb.
Since H is more electronegative than the Pb, it is, thus, expected that the H would be able to pull the electron charge towards itself. This will result in the H being negative.
Based on this:
PbH4 would be expected to <span>have polar covalent bonds with a partial negative charges on the H atoms. </span>