Answer:
An element that exhibits only the 2 oxidation state in its compounds is likely to be found in the p-block. This is because the p-block elements have valence electrons in the p-subshell, which can be either lost or gained to form ions. The two most common oxidation states for p-block elements are the oxidation state of the element minus the number of electrons in the p-subshell, and the oxidation state of the element plus the number of electrons in the p-subshell. For example, oxygen has six valence electrons, so its two most common oxidation states are -2 and +2.