What is the oxidation number of Phosphorus in the following compound? (Recall that the common oxidation number for Oxygen is -2 and the common oxidation number for H is +1.)

Without knowing the specific compound, it is not possible to determine the oxidation number of Phosphorus. The oxidation number of Phosphorus can vary depending on the compound it is in.

a

-2
b
+3
c
+2
d
-3
e
-1
f
+1

Without more information on the specific compound, it is not possible to determine the oxidation number of Phosphorus with certainty. However, some common oxidation numbers for Phosphorus are +3, +5 and -3 in various compounds.