Question

If IUPAC name of an element is unununium then correct statement regarding element is:
(a) It is an inner transition element.
(b) it belongs to 8th period in the periodic table
(c) It is the transition element
(d) It is a non-transition element.

Answer 1

First we will find the atomic number of the given element from its given IUPAC name and after finding the name, you can easily identify the category to which it belongs if you know about the periodic table properly. Now answer the statement.

Complete step by step answer:
The elements from after the atomic number 100 have been named according to their atomic numbers. So, from the given element name i.e. unununium we will first find the atomic number and then we can identify the group to which it belongs.
The notation of IUPAC nomenclature of elements are as;

Digit	Name	Abbreviation
0	nil	n
1	Un	u
2	bi	b
3	Tri	t
4	Quad	q
5	Pent	p
6	Hex	h
7	Sept	s
8	Oct	o
9	enn	e

So, it is clear that the atomic number of elements is 111.
From the periodic table we come to know that the element number with atomic number 111 is Roentgenium .
It comes under the category of the transition elements. Transition elements are those elements which lie in between the s-block and the p-block elements and in this, the last electron, enters the d-orbital.
So, thus from the above it is clear that the element having the IUPAC name as unununium is the transition element.

Hence, option (C) is correct.

Note: Don’t get confused in the transition and inner-transition elements. The d-block elements are called transition elements and here the last electron enters the d-orbital. On the contrary, the f-block elements are called as inner-transition elements and here the last electron enters the f-orbital.