What are valence shell and valence electrons?

Label the following in the diagram. Different energy shells, valence shell, valence electrons

Only the unpaired electrons present in the outermost shell of an atom are called valence electrons.

(a) What are valence electrons ? Where are valence electrons situated in an atom ? (b) What is the number of valence electrons in the atoms of an element having atomicm number 13 ? Name the valence shell of this atom.

What is the valence shell electronic configuration of group 13 elements?

What is the general valence shell electronic configuration of group 14 elements?

What will be the value of spin multiplication for the valence shell electrons of 7^(N) .

What is the valence shell electronic configuration of group 1 elements?

Electrons in _____ shell are called valence electrons.