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  • The IUPAC name of the element is Ununpentium. What is its atomic number?Option: 1 113Option:

The IUPAC name of the element is Ununpentium. What is its atomic number?

Option: 1

113


Option: 2

115


Option: 3

109


Option: 4

111


Answers (1)

 

IUPAC Nomenclature and Notation of Element -

IUPAC proposed a system for naming elements with Z > 100. By using these rules as follows.

  • The names are derived by using roots for the three digits in the atomic number of the element and adding the ending-ium. The roots for the numbers are:

 

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

Thus if the IUPAC name of the element is Ununpentium, then the atomic number is 115.

Therefore, Option(2) is correct.

Posted by

Ramraj Saini

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