Why does Z effective increase down a group?

Related questions

1. Why does the metallic character increase as you go down a group?
2. What are characteristics of the periodic table?
3. What is the periodic trend for metallic character?
4. Why does atomic radius decrease across a period and increase down a group?
5. Why does melting and boiling point increase down Group 7?
6. Does Electropositivity increase across a period?
7. What do the numbers on the periodic table mean?
8. What is classification of elements?
9. What is the trend of shielding effect?
10. What is Zeff trend?

Tags

1. #nucleus
2. #period
3. #increase
4. #effective
5. #shells
6. #going
7. #nuclear
8. #electrons
9. #additional
10. #stronger
11. #across
12. #gradual
13. #group
14. #decreases
15. #which
16. #decrease
17. #radius
18. #charge