2. Atomic Radius is the one-half the distance
between the two nuclei in two adjacent
metal atoms or in diatomic
molecules
Trend: Left to right: Decreases
Top to bottom: Increases
3. Arrange the following atoms in
order of increasing atomic radius:
a. Po, Pb, Rn
b. C, Li, Be
c. Sr,Mg, Ba
d. P,Si, N
8. Electronegativity
The tendency for an atom to
attract electrons towards the
positive nucleus.
Trend: Left to right increases
Top to bottom decreases
9. Arrange the following atoms
according to increasing
electronegativity.
A. I, Br, F, Cl
B. Sr, Sb, Sn, In
C. S, F, O
11. Electron Affinity
The energy released when an
electron is added to a gaseous
atom to form a negative ion.
Trend: Left to right increases
Top to bottom decreases
•
12. Specify which of the following
elements you would expect to
have the greatest electron
affinity and which would have
the least: K, Co, Si, Cl