Question

ans...both the papers...MCQs and the 2 questions...pls periodic classification of elements.

Answer 1

Answer:

Explanation:

1 . IODINE

2.  3

3. 11[ Na {sodium}]

4. F

5. The electron affinity is a measure of the attraction between the incoming electron and the nucleus. Generally, E.A decreases down a group, but E.A of Cl is greater than E.A of F because of fluorine

is such a small atom, you are putting the new electron into a region of

space already crowded with electrons and there is a significant amount

of repulsion. This repulsion lessens the attraction the incoming

electron feels and so lessens the electron affinity. Therefore Cl has the highest electron affinity