The sum of number of valence electrons and valency of an element with atomic number 15 is_____.

The valency of an element with atomic number 15 is

The valency of an element with atomic number 8 is :

The group number, number of valence electrons, and valency of an element with atomic number 15, respectively, are :

the maximum valency of an element with atomic number 7 is

" The group number,number of valence electrons and valency of an element with the atomic number "15" respectively are "

The valence electron configuration of an element with atomic number 23 is

The valence electron configuration of an element with atomic number 23 is

The valency of the element having atomic number 9 is