The valency of an element can be found from the electronic configuration of its atom write the electronic configuration of the following elements and, hence, their valency as well as the formulae of its chlorides and oxides
${}_{19}K$ ³⁹

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Solution

Electronic configuration — The distribution of an electron in a given shell or orbitals is considered an electronic configuration
It also predicts whether the element is metal,non-metal, metalloids, and a noble gas.
It is based on atomic numbers.
Electronic configuration of the given element{K] is 2,8,8,1.
Chlorides — when any metal reacts with a chlorine atom then it forms chlorides
When potassium reacts with chlorine forms potassium chloride i.e, KCl.
Oxides — when any metal reacts with an oxygen atom then it forms oxides
When potassium reacts with oxygen forms potassium oxide i.e, K₂O.
Thus, electronic configuration K- 2,8,8,1, and their chloride formula is KCl, and their oxides formula is K₂O.

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The valency of an element can be found from the electronic configuration of its atom write the electronic configuration of the following elements and, hence, their valency as well as the formulae of its chlorides and oxides K1939

The valency of an element can be found from the electronic configuration of its atom write the electronic configuration of the following elements and, hence, their valency as well as the formulae of its chlorides and oxides
${}_{19}K$ ³⁹