Why does melting and boiling point increase down Group 7?

Related questions

1. What is Z in Zeff?
2. Why does atomic radius decrease across a period and increase down a group?
3. What is Zeff trend?
4. What are the trends of modern periodic table?
5. What is the periodic trend for metallic character?
6. What do the numbers on the periodic table mean?
7. Does boiling point increase across a period?
8. What are the merits of Mendeleev periodic table?
9. Why is Cl more electronegative than F?
10. Does boiling point increase down a group?

Tags

1. #boiling
2. #reactive
3. #increase
4. #electrons
5. #atoms
6. #become
7. #increases
8. #halogens
9. #decreases
10. #group
11. #induced
12. #because
13. #forces
14. #points
15. #strength
16. #volatility
17. #interactions
18. #trends
19. #since
20. #dipole
21. #waals
22. #descend