Question

the electronic configuration of an element X is 2 8 6 to which group and period of modern periodic table does X belong state its valency and justify your answer in each case ..its is sodium or sulphur

Answer 1

The element ‘X’ is Sulphur
Justification:2+8+6=16
Thus, atomic number is 16.


The valency of the Sulphur is 2 as it requires 2 electrons to achieve octet condition.



The element belongs to 16th group and 3rd period

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Answer 2

Answer:

Element X is Sulphur, it is in group 16 and period 3.

Explanation:

The electron configuration of X is given by :

2 : 8 : 6

The atomic number = 2 + 8 + 6 = 16

16 is the atomic number of Sulphur in the periodic table.

Given the electron configuration we can identify the number of energy levels of element X.

Element X has 3 energy levels hence it is of period 3.

According to the modern periodic table element X is in group 16.

So the summary of the element X is :

Element name : Sulphur

Electron configuration : 2 : 8: 6

Atomic number : 16

Group : 16

Period : 3