Question

(a) How does the tendency to lose electrons change as we go down in group 1 of the periodic table? Why does it change this way?
(b) How does the tendency to gain electrons change as we go down in group 17 of the periodic table? Why does it change this way?

Answer 1

Answer:

(a) This is because the metallic character of an element increases down athe group and across the period

Answer 2

Increase in Valence Electrons Leads to Increment in Nuclear Charge

Explanation:

• (a) On moving down a group, the number of shells increases at each succeeding element.  

• So this results in the movement of valence electrons, which leads to more distance between nucleus & electrons.
• Hence, there is a decrement in the attractive forces between electrons and nucleus, which makes the electrons to travel down the group.

• (b) On moving from left-right in the period, there is an increase in valence electrons but the shells keep them self the same.
• As a result, effective nuclear charge increases and the tendency to lose electrons decreases.