Noble gases have _____electron affinity
High
Low
Zero
Very low
The order of ionization energy
s < p < d < f
s > p > d > f
s > d > p > f
s < d < p < f
Atomic radii increases on moving down a group due to
decrease in nuclear charge
increase of metallic character
the addition of new shells in succesive periods
the increase in chemical reactivity
Comparing the ionisation energy of fluorine with carbon, fluorine has
higher ionisation energy
lower ionisation energy
same ionisation energy
none of these
The electron affinity of an atom
is directly proportional to its size
is inversely proportional to its size
is independent of its size
Effective nuclear charge (Z*) can be calculated by using the formula
Z* = Z – S
Z* = Z + S
Z* = S – Z
Z = Z* – S
Electronegativity of an atom is
Directly proportional to its nuclear charge
directly proportional to its atomic radii
inversely proportional to its nuclear charge
independent
Across the period, electron affinity
decreases
increases
decrease and then increases
increase and then decreases
On moving down the group, the radius of an ion
Decreases
Increases
No change
None of these
Electron affinity is expressed in
kJ
J
kJ mol
kJ mol-1
