Question

If Z=19 what would be the valency of the element.write its electronic configuration.​

Answer 1

Answer:

Z = 19

this means protons are equal to 19.

as we know that protons are equal to the number of electrons in atoms.

so, electrons are equal to 19.

electronic configuration

K , L, M, N

2. 8. 8 1

therefore valence electron is 1 and valency is is 1