Which rule concerning oxidation numbers is NOT true? A. The product of all oxidation numbers in a molecule must equal the charge of that molecule.
B. A substance with only one type of atom in it has an oxidation number equal to the charge of the substance divided by the number of atoms present.
C. Group 1A metals always have an oxidation number of +1 in molecules that have more than one type of atom.
D. Group 2A metals always have an oxidation number of +2 in molecules that have more than one type of atom.
E. When paired with only one metal atom, Hydrogen has an oxidation number of –1.

Construct the hypothetical phase diagram for metals a and b between room temperature (20c) and 700c, given the following information: * the melting temperature of metal a is 480c. • the maximum solubility of b in a is 4 wt% b, which occurs at 420c. • the solubility of b in a at room temperature is 0 wt% b. • one eutectic occurs at 420c and 18 wt% b–82 wt% a. • a second eutectic occurs at 475c and 42 wt% b–58 wt% a. • the intermetallic compound ab exists at a composition of 30 wt% b–70 wt% a, and melts congruently at 525c.• the melting temperature of metal b is 600c. • the maximum solubility of a in b is 13 wt% a, which occurs at 475c. • the solubility of a in b at room temperature is 3 wt% a.

Determine the reaction and balance the following equations urgent due in the morning

Categorize them by metal, nonmetal, in periodic tableductilenon-ductilemalleableoften gain electrons easilygood conductorpoor conductorcan be liquidselements