7.
For each pair, circle the element with the highest electronegativity:
a. F
or N
d. Ca or Rb
b. Si
or Ge
e. W or Cr
c. Sn or Se
f. Cl or Al
Ionic Radius
8.
What is the periodic trend for ionic radius? Why does it change midway through the
period?

9.
Ionic radius increases down the table and to the left, resetting around the
carbon group. Groups 15-17 gain electrons for a configuration like the noble
gas after it. The others lose electrons to become like the previous noble gas.
For each pair, circle the element with the largest ionic radius:
10.
a. Cs+
or Na+
d. K+
or Ca2+
b. O2-
or N3-
e. Fe
or Fe3+
c. S
or S2-
f. C4+
or C4-
Draw arrows to show the trends below. Also, write the oxidation states above the
representative elements.
Atomic Radius
Electronegativity
Ionization Energy
Ionic Radius
1+
Ionic Radius
Ionization Energy
Electronegativity
Atomic Radius
2+
3+ 4± 3- 2- 1-