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Question

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

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Solution

The total number of elements having the lowest oxidation state of zero is 4.
The maximum oxidation state is the group number. The minimum oxidation state for metals is zero while for non-metals, it is equal to the group number minus 8. The maximum and the minimum oxidation states are given below:
Compound Maximum Minimum
a. Ta +5 0
b. Te +6 -2
c. Tc +7 0
d. Ti +4 0
e. Tl +3 0

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