Which of the following statement(s) is/are correct? — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

Step 1: Decode the IUPAC name "unununium" to obtain the atomic number: un (1) + un (1) + un (1) + ium = 111. Step 2: Write the configuration of the element with Z=111: [Rn] 5f14 6d9 7s2 (or more stable [Rn] 5f14 6d10 7s1), placing it in the d-block of the 7th period. Step 3: Since it is a d-block element, it is classified as a transition element, which is option (c).