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WorksheetsBohr Models Dot Diagrams Atoms Ions Isotopes
Total questions: 25
Worksheet time: 2hrs 1mins
Name
Class
Date
1.
What element is this?
a)
Helium
b)
Hydrogen
c)
Argon
d)
Silver
2.
How many total electrons does Si contain? (click to see image)
a)
14
b)
28
c)
4
d)
0
3.
How many total electrons does an ion of potassium K+ contain? (click to see image)
a)
18
b)
20
c)
18
d)
40
4.
What element is represented in this Bohr Model?
a)
Carbon
b)
Hydrogen
c)
Aluminum
d)
Lithium
5.
What are valence electrons?
a)
electrons in the second energy level
b)
electrons in the outermost energy level
c)
all electrons
d)
electrons in the first level
6.
How many valence electrons are in Phosphorus?
a)
15
b)
4
c)
5
d)
31
7.
How many electrons are in the outer shell of Sodium (Na)?
a)
3
b)
1
c)
2
d)
4
8.
What element?
a)
Boron
b)
Carbon
c)
Nitrogen
d)
Lithium
9.
What element?
a)
Lithium
b)
Boron
c)
Carbon
d)
Neon
10.
What element?
a)
Beryllium
b)
Boron
c)
Barium
d)
Bromine
11.
How many electrons should an ion of Fluorine F- have around its electron dot model?
a)
6
b)
7
c)
8
d)
1
12.
How many electrons should Boron have around its electron dot model?
a)
1
b)
2
c)
3
d)
5
13.
How many electrons should Beryllium have around its electron dot model?
a)
1
b)
2
c)
3
d)
4
14.
How many electrons should Nitrogen have around its electron dot model?
a)
1
b)
3
c)
4
d)
5
15.
How many electrons should Magnesium have around its electron dot model?
a)
1
b)
2
c)
3
d)
4
16.
How many electrons should Chlorine have around its electron dot model?
a)
5
b)
6
c)
7
d)
8
17.
atoms of the same element will always have the same number of
a)
neutrons
b)
protons
c)
isotopes
d)
electrons
18.
How are electrons arranged in an atom?
a)
In groups of eight
b)
In energy levels
c)
By color
d)
By shape
19.
Carbon has the same number of valence electrons as
a)
Nitrogen
b)
Silicon
c)
Boron
d)
The number of valence electrons is unique to Carbon
20.
True or false: A neutral atom can have an empty valence shell with 0 valence electrons.
a)
False
b)
True
21.
True or false: An atom can have less than 8 valence electrons and still have a full valence.
a)
True
b)
False
22.
How can we calculate the number of electrons in a neutral atom?
a)
Use the number of protons
b)
Use the number of neutrons
c)
Use the average atomic mass
d)
Use the mass number
23.
What is the valence number for the last column in the periodic table (all the way to the right)
a)
2
b)
8
c)
Depends on the element, but the valence will always be full
d)
0
24.
How can you find the valence electrons if you don't have the column's valence number memorized?
a)
Draw a Bohr Model
b)
Give up and cry
25.
You should always have this handy when working on Bohr Model and electron dot diagram problems on homeworks/quizzes/tests..
a)
The periodic table
b)
Google
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