in case of halogens.. when we talk about boiling point.. we consider the bond between two atoms of (let's say argon) and say that it is made up of weak vanderwal forces which is between two atom of argon ... and not inside two atoms of argon....but in every other case like in case of group 1, we consider the bonds within a atom like intermolecular forces which exists inside the atom ..... not outside as in case of halogens... why is so ???
Dear Student,
1st thing is - Argon is not a halogen. Ar is a noble gas in group 18.
Halogens are in group 17. F, Cl, Br, I, At.
2nd thing- Vanderwaals forces are not bonds. These are weak interactions.
3rd thing - NO BOND IS INSIDE ATOMS. All bonds of each and every type, are between atoms.
Noble gases have weak interatomic forces. So, they have low melting & boiling points.
Other gases have more interatomic forces, because they are reactive. So, higher mp & bp.
Regards
1st thing is - Argon is not a halogen. Ar is a noble gas in group 18.
Halogens are in group 17. F, Cl, Br, I, At.
2nd thing- Vanderwaals forces are not bonds. These are weak interactions.
3rd thing - NO BOND IS INSIDE ATOMS. All bonds of each and every type, are between atoms.
Noble gases have weak interatomic forces. So, they have low melting & boiling points.
Other gases have more interatomic forces, because they are reactive. So, higher mp & bp.
Regards