Valence shell electrons in an element are the most loosely bound 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 atomic number 13 ? Name the valence shell of this atom.
The ionisation energy is calculated for the energy required to liberate the most loosely bound electron from the outermost shell of an atom when its element is in its ______ state.