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WorksheetsChemistry
Total questions: 40
Worksheet time: 39mins
Name
Class
Date
1.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
2.
The first energy level can hold up to how many electrons?
a)
8
b)
4
c)
2
d)
5
3.
What is the atomic mass of "F"
a)
9
b)
18
c)
17
d)
19
4.
all matter is made of what
a)
energy
b)
atoms
c)
electrons
d)
compounds
5.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
6.
the central region of an atom where its neutrons and protons are is its
a)
nucleus
b)
electron cloud
c)
core
d)
center
7.
an atom with atomic number 6 would have how many protons
a)
6
b)
12
c)
3
d)
cannot be determined
8.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
9.
An atoms overall charge is
a)
positive
b)
depends on its mood
c)
neutral
d)
negative
10.
Which of the following is a negatively charged subatomic particle?
a)
Electron
b)
Proton
c)
Neutron
d)
Quark
11.
All matter is made of what?
a)
energy
b)
atoms
c)
electrons
d)
compounds
12.
The particles that are found in the nucleus of an atom are
a)
neutrons and electrons
b)
electrons only
c)
protons and neutrons
d)
protons and electrons
13.
The atomic number of an elements is the total number of which particles in the nucleus?
a)
neutrons
b)
protons
c)
electrons
d)
protons and electrons
14.
Which of the following is a positively charged subatomic particle found in the nucleus of an atom?
a)
Electron
b)
Proton
c)
Neutron
d)
Quark
15.
Which of the following is a subatomic particle with no charge that is found in the nucleus of an atom?
a)
Electron
b)
Proton
c)
Neutron
d)
Quark
16.
Where are electrons of an atom found?
a)
Nucleus
b)
Electron Cloud
c)
Some are in the nucleus and some in the electron cloud.
d)
They are moving everywhere.
17.
Element or compound?
O2
O2
a)
Element
b)
Compound
18.
Element or compound?
H2O
H2O
a)
element
b)
compound
19.
A physical change is?
a)
It changes the object into something different
b)
Objects or substances undergo a change that does not change their chemical composition
c)
it is just like a chemical reaction
d)
Paper burning
20.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
21.
A chemical change is?
a)
a shoe lace cut in half
b)
doesn't change anything
c)
changes the look of an object
d)
change that results in the formation of new chemical substances
22.
The arrow symbol used in a chemical equation
a)
Yield sign
b)
Subscript
c)
Coefficient
d)
Chemical formula
23.
A way to show the number and type of elements (atoms) in a molecule or compound with a combination of symbols and numbers.
a)
Molecule
b)
Chemical formula
c)
Physical change
d)
Coefficient
24.
The large number written in front of a chemical formula. It shows the number of molecules.
a)
Molecule
b)
Compound
c)
Coeffiecient
d)
Subscript
25.
How many Hydrogen atoms are in H2O?
a)
zero
b)
one
c)
two
d)
three
26.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
27.
In this image, what are the information in red is called the_______.
a)
Product
b)
Reactant
c)
Chemical Subscript
28.
In this image, what are the information to the right of the arrow (in black) is called the_______.
a)
Product
b)
Reactant
c)
Chemical Subscript
29.
What are the reactants in the following chemical equation?
2H2 + O2 --> 2H2O
2H2 + O2 --> 2H2O
a)
H2
b)
O2
c)
2H2 + O2
d)
2H2O
30.
What are the products in the following chemical equation?
2H2 + O2 --> 2H2O
2H2 + O2 --> 2H2O
a)
H2
b)
O2
c)
2H2 + O2
d)
2H2O
31.
The Law of Conservation of Mass states that ALL matter....
a)
can be created and destroyed
b)
cannot be created nor destroyed but can change form
c)
cannot be created nor destroyed but can be transfered
d)
can be created but not destroyed
32.
Coefficients tell us how many ________ there are of an element in a compound.
a)
Elements
b)
Atoms
c)
Molecules
33.
Subscripts are the _________ numbers in a chemical formula.
a)
Smaller
b)
Larger
34.
Coefficients are the _________ numbers in a chemical formula.
a)
Smaller
b)
Larger
35.
How many ELEMENTS are in the compound H2O
a)
1
b)
2
c)
3
d)
4
36.
How many ATOMS of Carbon are in 3C2H4O
a)
2
b)
3
c)
4
d)
6
37.
How many ATOMS of Oxygen are in 3Fe2O3
a)
2
b)
3
c)
6
d)
9
38.
How many TOTAL atoms are in 2H2SO4
a)
2
b)
4
c)
7
d)
14
39.
How many TOTAL atoms are in 2CaO2
a)
2
b)
3
c)
5
d)
6
40.
Is the following equation balanced or unbalanced ?
Al + O2 --> Al2O3
Al + O2 --> Al2O3
a)
Balanced
b)
Unbalanced
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