Match the atomic number 19, 15, 8, 4, and 2 with each of the following:

(i) A metal of valency one.

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Solution

Potassium has the atomic number 19 with electronic configuration 2, 8, 8, 1 so it has 1 valence electron and belongs to group 1.

Thus, potassium is the metal having atomic number 19 and valency 1.

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Similar questions

Match the atomic number 4, 8, 14, 15 and 19 with each of the following:

(a) A solid non-metal of valency 3.

(b) A gas of valency 2.

(d) A non-metal of valency 4.

2, 4, 8, 15,

19

2

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