Chapter 1 Worksheet : Atomic Models
Draw an oxygen atom according to each of the following atomic models.
a) Dalton’s atomic model
b) Thomson’s atomic model
Chapter 1 Worksheet : Atomic Models
c) Rutherford’s atomic model
model
d) the Rutherford-Bohr atomic
What am I?
a) an alkali metal with four electron shells
Potassium
b) an element with two valence electrons and three electron shells
Magnesium
c) a group with seven valence electrons
The halogens
d) an element with two more electrons than lithium
Boron
e) the group of the element with 20 protons
The alkaline earth metals
f) the number of valence electrons in sulphur
Six
3. Complete the table below.
Symbol
Atomic
number
Nitrogen
N
7
7
7
7
14
Sodium
Na
11
11
11
12
23
Magnesium
Mg
12
12
12
12
24
Cesium
Cs
55
55
55
78
133
Element
Number of Number of Number of
protons
electrons
neutrons
Mass
number
Chapter 1 Worksheet : Atomic Models
Manganese
Mn
25
25
25
30
55
Copper
Cu
29
29
29
35
64
Oxygen
O
8
8
8
8
16
Chlorine
Cl
17
17
17
18
35
Carbon
C
6
6
6
6
12
Silver
Ag
47
47
47
61
108
Chapter 1 Worksheet : Atomic Models
Complete the table below.
Element
Symbol
Group
Metal
Nonmetal
Barium
Ba
Alkaline earth metals

Rubidium
Rb
Alkali metals

Boron
B
Boron group
Chlorine
Cl
Halogens

Neon
Ne
Noble gases

Zinc
Zn
Zinc group
Carbon
C
Carbon group

Bromine
Br
Halogens

Fluorine
F
Halogens

Metalloid


5. Which element has one more electron than lithium?
Beryllium
6. Which element, if it lost three electrons, would have an electron configuration similar
to that of neon?
Aluminum
7. Draw a Lewis structure for each of the following elements.
a) boron
d) sulphur
b) sodium
e) phosphorus
c) oxygen
f) fluorine
Chapter 1 Worksheet : Atomic Models
8. For each of the following elements, write its group number and the number of valence
electrons in its outermost electron shell.
a)
lithium
Group I and one valence electron
b) chlorine
Group VIIA and seven valence electrons
c) argon
Group VIIIA and eight valence electrons
d) calcium
Group IIA and two valence electrons
Chapter 1 Worksheet : Atomic Models
9. Draw each of the following elements according to the Rutherford-Bohr atomic model.
a) aluminum
d) chlorine
b) boron
e)
c) nitrogen
f) sulphur
beryllium
Chapter 1 Worksheet : Atomic Models
10. EST Draw each of the following elements according to the simplified atomic model.
a) magnesium
d) oxygen
b) silicon
e) helium
c) carbon
f) fluorine