MHTCET 16 May 2024 Shift 2 Paper

Concept:Actinoid elements are the f-block elements from actinium ($\mathrm{Ac}$, $Z=89$) to lawrencium ($\mathrm{Lr}$, $Z=103$).Explanation:Nobelium ($\mathrm{No}$) has atomic number $102$, which lies within the actinoid series from $89$ to $103$.Hence, option A, $\mathrm{No}$, is an actinoid element.Molybdenum ($\mathrm{Mo}$) and cobalt ($\mathrm{Co}$) are d-block transition metals, not actinoids.Cerium ($\mathrm{Ce}$) is a lanthanoid element, not an actinoid.Answer:A. $\mathrm{No}$ (Nobelium)