JEE Main · 2019 · 08 Apr 2019 · Shift 2 · Classification of Elements and Periodicity

The IUPAC symbols for the element with atomic number 119 would be:

(A)uun
(B)uue✓ Correct
(C)unh
(D)une

Answer: (B)

Solution

For elements beyond atomic number 112 the IUPAC systematic name is built digit by digit, each digit having a root:

0

nil,

1

un,

2

bi,

3

tri,

4

quad,

5

pent,

6

hex,

7

sept,

8

oct,

9

enn. Atomic number 119 reads off as its digits

1, 1, 9

, giving un-un-enn and the name ununennium. The symbol takes the first letter of each root, so it is Uue, written with only the first letter capitalised.

JEE Main · 2019 · 08 Apr 2019 · Shift 2 · Single correct option

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