Name_______________________________
Attendance Number_____________
Periodic Table
1. Define a family in the Periodic Table
2. What is a period?
3. What period are the following elements in?
Element
Period
Element
He
Rb
Ge
I
Period
4. What groups are the following elements in?
Element
Group
Element
Sulfur
Ca
Iodine
Fe
Group
5. Give an atom with the following characteristics?
Characteristic Atom
Characteristic
Atom
Halogen
Nonmetal
Alkali metal
metalloid
Lanthanide
Alkaline Earth Metal
series
Transition
Nobel Gas
metal
1|Page
Chapter 18 Homework
Name_______________________________
Attendance Number_____________
Homework: Atomic Number
Protons, Neutrons, and Electrons Practice Worksheet
Fill in the blanks in the following worksheet. Please keep in mind that the isotope
represented by each space may NOT be the most common isotope or the one closest in
atomic mass to the value on the periodic table.
Atomic
symbol
Atomic
number
Protons
B
Neutrons Electrons
6
11
24
31
37
39
29
89
35
43
100
207
Pb
102
89
Mo
70
225
53
81
100
206
159
No
Yb
261
172
106
2|Page
Atomic
mass
159
Chapter 18 Homework
Name_______________________________
Attendance Number_____________
Homework: Isotopes and Mass Number
1. Here are three isotopes of an element:
6
12
C
6
13
C
6
14
C
a. The element is: __________________
b. The number 6 refers to the _________________________
c. The numbers 12, 13, and 14 refer to the ________________________
d. How many protons and neutrons are in the first isotope? _________________
e. How many protons and neutrons are in the second isotope? _________________
f. How many protons and neutrons are in the third isotope? _________________
2. Complete the following chart:
Isotope name
atomic #
mass #
# of protons
# of neutrons
# of electrons
92 uranium-235
92 uranium-238
5 boron-10
5 boron-11
3|Page
Chapter 18 Homework
Name_______________________________
Attendance Number_____________
Homework: Electron Configuration
Complete the Chart:
Atomic
Total
symbol
e-
e- in
n=1
e- in
n=2
e- in
n=3
# of
valence e-
Energy
level of
valence e-
n=1
n=1
n=2
H
He
Li
Be
1
2
3
1
2
2
0
0
0
0
1
0
1
2
1
4
2
2
0
2
n=2
B
C
N
O
F
Ne
Na
Mg
Al
Si
P
S
Cl
Ar
5
6
2
2
3
4
0
0
3
4
n=2
n=2
7
2
5
0
5
n=2
Describe what patterns you see in this chart. Do you expect them to continue
throughout the periodic table?
4|Page
Chapter 18 Homework