Courtney

The second part of the question I understand now, but I'm still stuck on the first part.

Hi everyone! I am a little bit stuck on these questions. Use the concepts of electronegativity and polarisation to interpret the bonding in (a) AgBr and (b)HBr. Using the atom of chlorine - 35 explain the terms (a) mass number and (b) electron configuration. (ii) How can the idea of electron configuration be used to explain chemical reactivity? Can anybody help? Thank you for taking the time to read this.