Why does basicity decrease down a group?

Related questions

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4. Why zno is amphoteric in nature?
5. What are dry cell batteries used for?
6. What happens to the oxidation number of an element during oxidation?
7. Which is better dry cell or wet cell?
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Tags

1. #tendency
2. #group
3. #density
4. #element
5. #basicity
6. #increases
7. #donate
8. #electrons
9. #hence
10. #decreases
11. #electron