The common positive oxidation states for an element with atomic number 24,
Question:

The common positive oxidation states for an element with atomic number 24, are :

1. $+2$ to $+6$

2. $+1$ and $+3$ to $+6$

3. $+1$ and $+3$

4. $+1$ to $+6$

Correct Option: 1

Solution:

$\operatorname{Cr}(Z=24)$

[Ar] 4s $3 \mathrm{~d}^{5} \mathrm{Cr}$ shows common oxidation states starting from $+2$ to $+6$.