Question

Assuming that 113 elements are there in the periodic table now, what would be the group and period to which newly added element belongs?
A.IVA group, 7th period.
B.VIA group, 7th period.
C.VA group, 7th period.
D.VIIA group, 6th period.

Answer 1

Hint: Group: Elements having similar chemical properties are grouped together at regular intervals, within the vertical columns in periodic table.
Period: A period is a horizontal row of elements in the periodic table.

Complete step by step answer:
There are a total 7 periods in the periodic table. With every increasing period a new principal energy level begins which is filled with electrons subsequently. Period 1 has two elements i.e. Hydrogen and Helium, periods 2 and 3 have a total 8 elements. Periods 4 and 5 have 18 elements. And Periods 6 and 7 have 32 elements, to fit the elements properly into the table 2 rows of lanthanides and actinides are separated from period 6 and 7 and are placed at bottom. The element 113 belongs to period 7 in the periodic table.
The vertical columns of the periodic table are called Groups, and are based on the arrangement of the outer shell electrons. There are 18 groups in the periodic table. Two different methods of numbering systems are commonly used to designate groups. The traditional system uses letters A and B and IUPAC decided to follow numbering from 1 to 18 from left to right. The element 113 belongs to IIIA group.
The addition of a new element takes place after the last known element.
So from the above discussion the newly added element will have an atomic number of 114, and will be placed next to element 113.
The electronic configuration of this element is \[\left[ {Rn} \right]5{f^4}6{d^{10}}7{s^2}7{p^2}\].
Thus, it’ll belong to group IVA and will be in period 7

Hence, option (A) is correct.


Note:
To eliminate confusion in the traditional system which arose at different locations, the International Union of Pure and Applied Chemistry (IUPAC) decided that the official system for numbering of groups would be 1 to 18 from left to right.