AIncreases
BDecreases
CFirst increases than decreases
DFirst decreases than increases
Answer:
B. Decreases
Read Explanation:
In Group – Elements have the same number of valence electrons.
In period – valence shell electrons increase by one unit.
As the group goes down – the number of shells increases
In period – moving from left to right, the number of shells remains the same
Down the group – the atomic radius increases because the effective nuclear charge decreases.
In the period – the atomic radius decreases because the effective nuclear charge increases by one unit. This brings the valence electrons closer to the nucleus.
In group – nuclear charge decreases. The tendency to lose valence electrons increases. Hence, the metallic character increases
In period – As the nuclear charge increases, the tendency to lose valence electrons decreases. Hence, the metallic character is reduced
In group – nuclear charge decreases. The tendency to gain electrons in the valence shell decreases. Hence, the non-metallic character is reduced
In period – non-metallic character increases as nuclear charge increases and tendency to gain electrons in valence shell increases.
In the group – as the nuclear charge decreases, the tendency to gain electrons in the valence shell decreases and the electronegativity decreases.
In period – As the nuclear charge increases and the tendency to gain electrons in the valence shell increases, the electronegativity increases.