1405 - Chapter 5 - The Periodic table
Practice Problems
1. For each of the following elements, write its chemical symbol or name, and indicate the type
and group to which it belongs:
a) Cesium
b) Antimony
c) Fluorine
d) Hg
e) Ca
2. Predict whether each of the following element is a representative element/transition
element/noble gas/lanthanide/actinide
a) Na
b) N
c) Co
d) Th
e) Al
f) Xe
g) Mn
h) I
i) Rn
j) Os
k) Bi
l) Fr
m) Po
n) Np
3. Arrange the elements of the 3rd period in the order of
1. Decreasing order of atomic radius
2. Increasing order of ionization energy
4. Which of the element in each of the following pairs has the highest ionization energy?
a) F/Cl
b) Be/B
c) Ne/Na
d) Ar/Kr
e) Al/Ga
5. What do you understand by iso-electronic ions? Identify the iso electronic ions from the
following .
K+
Ca2+
Br-
Na+
Cl-
Cs+
La3+
O2-
6. Identify the element with greater metallic character
K/Ca
Sc/V
Fe/Co
Zn/Cd
Pb/Bi
Li/Na
7. Find the Lewis symbols of the following elements
Al
Si
S
Cl
Ar
Na+
F-
7. Predict the ionic charge of the following elements
B
S
Sr
Cs
Sb
Br
I
Xe