Among the following elements, what is the total number of elements having the lowest oxidation state of zero? a. b. c. d. Ti e.

(4)

The maximum oxidation state is the group number. The minimum oxidation state for metals is zero; for non-metals it is equal to the group number minus 8. The maximum and the minimum oxidation states are

a. +5, 0     b. +6, c. +7, 0  d. +4, 0   e. +3, 0