Question

.
The electronic configuration of an element is 2,8,8,1.
(i)
State its group number and period number in the Modern periodic Table.
(ii)
State whether this element is a metal or a non-metal. Justify your answer in
each case.​

Answer 1

Hey there....

The electronic configuration of an element is 2,8,8,1

The atomic number of Potassium is 19.

therefore, the element is Potassium.

Now,

1. Last shell defines the group..

means..

last shell contains valency 1.

So, the group of Potassium is 1st group.

2. No. of shell defines the period...

means..

it contains 4 shell ...

So, the period of Potassium is 4th period.

Now,

It is present in 1st group that is s block..

Elements of s block are Metals.

So, Potassium is Metal.

hope helpful..

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