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. $Tl$

Answer 1

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