Question

For the 115th element _________ is the name as per IUPAC nomenclature and __________ is the official name.

(a) Unnilquadium, Mendelevium

(b) Unnilunium, Rutherfordium

(c) Ununpentium, Moscovium

(d) Moscovium, Ununpentium

I got this question in class test.

This key question is from Periodic Table Classification in portion Classification of Elements and Periodicity in Properties of Chemistry – Class 11

Answer 1

Right answer is (c) Ununpentium, Moscovium

Easy explanation: As per IUPAC nomenclature, the roots are as follows: 0 – nil, 1 – un, 2 – bi, 3 – tri, 4 – quad, 5 – pent, 6 – hex, 7 – sept, 8 – oct and 9 – enn. So 115 is Ununpentium and the official name is Moscovium was named after the Moscow Oblast in which Joint Institute for Nuclear Research is situated.