Which of the following elements (identified by their atomic numbers) are CORRECTLY matched with thei — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

$Z=58$ is Cerium ($Ce$), the first lanthanide, thus an f-block element. $Z=38$ is Strontium ($Sr$), which has the configuration $[Kr] 5s^2$, hence an s-block element. $Z=49$ is Indium ($In$), $[Kr] 4d^{10} 5s^2 5p^1$, a p-block element. $Z=24$ is Chromium ($Cr$), $[Ar] 3d^5 4s^1$, a d-block transition element.