Question

valence electron , valency , type of ion , metal/non-metal of 23
NA
11

Answer 1

²³Na₁₁ is sodium with atomic number 11 and mass number 23.

Number of electrons is 11 and electronic configuration 2.8.1
Valence electrons (electrons in outermost shell) = 1
Valency is 1
As there is one electrons in the valence shell, the atom loses this to form a cation.
As the element loses electron and forms a cation, it is a metal.