Question
In general, the properties that decrease and increase down a group in the periodic table, respectively, are:
A.
atomic radius and electronegativity.
B.
electron gain enthalpy and electronegativity.
C.
electronegativity and atomic radius.
D.
electronegativity and electron gain enthalpy.
Answer :
electronegativity and atomic radius.
Solution :
Generally, electronegativity decreases down the group as the size increases. This can also be formulated as:
$${\text{Electronegativity}}\, \propto \frac{1}{{{\text{size}}}}$$