Does the basicity decrease going down the columns and right across rows of the Periodic Table?
Basicity is a substance's ability to donate its electrons. It is the ability of a specific compound to act as a proton acceptor. Basicity decreases as the size of the atom increases.
Answer and Explanation:
In the Periodic Table, elements lie in columns of increasing size from top to bottom. As the size of the atom increases, the atomic radius also increases, which decreases the ionization energy of the atom. So, the metallic character of the atom increases, which leads to a decrease in the basicity because the metallic character and basicity are inversely related.
When moving right across a period, metallic character decreases, so basicity increases.
Therefore, the basicity of an element DECREASES going down the columns of the Periodic Table but INCREASES moving across the rows of the Periodic Table.
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Learn more about this topic:
from Chemistry 101: General ChemistryChapter 3 / Lesson 1