Worksheets8th Grade Chemistry Test
Total questions: 50
Worksheet time: 25mins
Name
Class
Date
1.
What is the charge of an electron?
a)
negative
b)
neutral
c)
no charge
d)
positive
2.
What two subatomic particles are found in the nucleus of an atom?
a)
Protons and electrons
b)
Electrons and neutrons
c)
Protons and neutrons
d)
Protons and atoms
3.
Which best describes the location and charge of a proton?
a)
Inside the nucleus, positive
b)
electron cloud, negative
c)
inside the nucleus, negative
d)
electron cloud, positive
4.
Which subatomic particle(s) makes up the majority of the mass of an atom?
a)
Protons
b)
Electrons
c)
Electrons and Neutrons
d)
Protons and Neutrons
5.
Which best describes the location and charge of a neutron?
a)
nucleus, neutral (no charge)
b)
electron cloud neutral
c)
nucleus, positive
d)
nucleus, negative
6.
How many valance electrons does nitrogen have?
a)
5
b)
15
c)
2
d)
4
7.
How many protons does chlorine have?
a)
35
b)
17
c)
18
d)
4
8.
How many atoms are present in the following compound?
a)
3
b)
48
c)
4
d)
47
9.
Which subatomic particle(s) determines the atomic number?
a)
protons
b)
neutrons
c)
electrons
d)
protons and neutrons
10.
Which group is the most reactive group of elements?
a)
Group 1
b)
Group 4
c)
Group 8
d)
Group 18
11.
An unknown element has 9 protons, 10 neutrons, and 9 electrons. What is it?
a)
Neon
b)
Cobalt
c)
Aluminum
d)
Fluorine
12.
How many valance electrons does boron have?
a)
5
b)
3
c)
11
d)
13
13.
What do periods on the periodic table have in common?
a)
Same number of valance electrons
b)
Same number of energy levels
c)
Same number of protons
d)
Similar reactivity
14.
What do groups on the periodic table have in common?
a)
Same number of valance electrons
b)
Same number of energy levels
c)
Both A and B
15.
Which two elements have the same number of energy levels?
a)
Potassium and magnesium
b)
Beryllium and magnesium
c)
Carbon and phosphorus
d)
Carbon and oxygen
16.
Which element is in group 16, period 3?
a)
Arsenic
b)
Carbon
c)
Sulfur
d)
Boron
17.
Which is not evidence of a chemical change?
a)
Bubbling or fizzing
b)
Unexpected temperature change
c)
Fire or smoke
d)
Phase change
18.
Two chemicals were mixed together and produced bubbles. What kind of change is happening?
a)
Physical change
b)
Chemical change
c)
Phase change
d)
none of the options
19.
Which is evidence of a chemical change?
a)
Rusting
b)
Unexected color change
c)
A precipitate was formed
d)
All options are correct
20.
When a new substance is formed, what kind of change has taken place?
a)
Physical change
b)
Chemical change
c)
Phase change
d)
None of the options
21.
Which is the best example of a chemical change?
a)
A wall was painted red
b)
A piece of paper was cut into 36 pieces
c)
A bike rusted in the rain over time
d)
Ice melted and turned into water
22.
The process of chewing food is an example of a
a)
physical change.
b)
chemical change.
c)
elemental change.
d)
atomic change.
23.
When stomach acid helps to break down food into smaller particles, this is an example of a:
a)
physical change.
b)
chemical change.
c)
elemental change.
d)
atomic change.
24.
Use your periodic table to determine if silicon is a metal, nonmetal, or metalloid.
a)
Metal
b)
Nonmetal
c)
Metalloid
25.
Use your periodic table to determine if hydrogen is a metal, nonmetal, or metalloid.
a)
Metal
b)
Nonmetal
c)
Metalloid
26.
Use your periodic table to determine if calcium is a metal, nonmetal, or metalloid.
a)
Metal
b)
Nonmetal
c)
Metalloid
27.
In a balanced equation the number of atoms in the _____________ and _____________ must be equal.
a)
Product, reactant
b)
product, quotient
c)
product, sum
d)
reactant, reaction
28.
Is the equation below a balanced equation?
a)
Yes
b)
No
29.
Is the equation below a balanced equation?
a)
Yes
b)
No
30.
The group of elements and/or compounds after a chemical reaction has taken place are called
a)
reactions
b)
processes
c)
products
d)
reactants
31.
How many atoms of hydrogen are in the compound above?
a)
12
b)
24
c)
36
d)
3
32.
How many total atoms are in the compound above?
a)
3
b)
4
c)
5
d)
12
33.
How many total atoms are in the compound above?
a)
1
b)
3
c)
4
d)
8
34.
How many total atoms are in the compound above?
a)
3
b)
4
c)
5
d)
6
35.
How many atoms of hydrogen are in the compound above?
a)
3
b)
5
c)
6
d)
8
36.
How many atoms of oxygen are in the compound above?
a)
12
b)
14
c)
4
d)
3
37.
How many elements are in the formula above?
a)
12
b)
24
c)
36
d)
3
38.
How many elements are in the formula above?
a)
3
b)
4
c)
5
d)
12
39.
How many elements are in the formula above?
a)
1
b)
3
c)
4
d)
8
40.
How many elements are in the formula above?
a)
3
b)
4
c)
1
d)
8
41.
How many elements are in the formula above?
a)
12
b)
14
c)
4
d)
3
42.
What is the name of this polyatomic ion?
a)
nitride
b)
nitrite
c)
nitrate
d)
nitrogen oxide
43.
What is the name of this polyatomic ion?
a)
Sulfide
b)
Sulfite
c)
Sulfate
d)
Sulfur oxide
44.
What is the name of this polyatomic ion?
a)
Chloride
b)
Chlorite
c)
Chlorate
d)
Perchlorate
45.
What is the name of this polyatomic ion?
a)
manganese oxide
b)
manganite
c)
manganate
d)
permanganate
46.
What is the name of this polyatomic ion?
a)
nitrogen hydride
b)
ammonium
c)
hydrogen nitride
d)
ammoniate
47.
What is the name of this polyatomic ion?
a)
Acetate
b)
Ammonium
c)
Amalgam
d)
carbon hydride
48.
Is this an element, mixture, or compound?
a)
element
b)
mixture
c)
compound
49.
Is this an element, mixture, or compound?
a)
element
b)
mixture
c)
compound
50.
Is this an element, mixture, or compound?
a)
element
b)
mixture
c)
compound
100 %
