Which is a third transition series element?
A)Al
B)Mg
C)Pr
D)Pt

Question

Quizplus · Accepted Answer

Pt (platinum) is the only element in the options given that belongs to the third transition series, which is defined as the series that follows the second transition series and includes elements with partially filled d orbitals in their atomic electronic structure. Al (aluminum) and Mg (magnesium) are both elements in the third period of the periodic table but belong to the s-block, not the d-block transition metals. Pr (praseodymium) is a lanthanide element, not a transition metal.

Which Is a Third Transition Series Element