INORGANIC - GROUP 7

Question 1

trend in electronegativity of halogens

Answer 1

down the group the electronegativity of the elements decrease
the atomic radii increases down the group due to the increasing number of shells - nucleus is therefore less able to attract the bonding pair of electrons

Question 2

trend in melting and boiling point

Answer 2

increases down the group
as molecule become larger they have more e- so have larger vdw forces between molecules
- as the imf get larger more energy has to be put into break the forces, increases mp and bp