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WorksheetsUnit 3 Practice
Total questions: 32
Worksheet time: 25mins
Name
Class
Date
1.
What are the products in the formula?
a)
Fe2O3 + C
b)
Fe + CO2
2.
What happens in a chemical equation?
a)
They combine physically to form a new element.
b)
They combine physically to form a new mixture.
c)
They combine chemically to form a new compound.
d)
They combine chemically to form individual elements.
3.
the starting materials in a chemical reaction
a)
Products
b)
Reactants
c)
Starters
d)
Enders
4.
a substance that is formed as the result of a chemical reaction
a)
Product
b)
Reactant
c)
Starters
d)
Enders
5.
a substance formed when two or more elements are chemically bonded together
a)
Element Soup
b)
Pure Element
c)
Ion
d)
Compound
6.
tells us the number of atoms of each element in a compound
a)
Coeffecient
b)
Exponent
c)
Chemical Formula
d)
Calculator
7.
the symbolic representation of a chemical reaction
a)
Long Hand
b)
Short Hand
c)
Electron Configuration
d)
Chemical Equation
8.
Which is the name of the kind of solid substance formed in this figure?
a)
aqueous
b)
precipitate
c)
acid
d)
synthesis
9.
Describes the number of molecules in a compound and is used to balance a chemical reaction.
a)
coefficient
b)
subscript
c)
superscript
d)
SI unit
10.
Provides evidence that a chemical reaction has occurred.
a)
dissolving
b)
melting
c)
formation of a gas
d)
bending
11.
Describes the number of atoms in a compound of each element.
a)
coefficient
b)
superscript
c)
subscript
d)
SI unit
12.
What is the left part of a chemical equation called?
2H2 + O2 --> 2H2O
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
13.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
14.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
15.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
16.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
17.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
18.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
19.
How many Hydrogen atoms (H) are in a molecule of H2O?
a)
1
b)
2
c)
3
d)
0
20.
The small number to the right of an elemental symbol ( H2) is called?
a)
a subscript
b)
a coefficient
c)
a variable
d)
a divisor
21.
More than two atoms stuck together is called a ...................
a)
element
b)
molecule
c)
Chemical property
d)
Physical property
22.
The smallest building block of matter is the......................
a)
compound
b)
molecule
c)
atom
d)
fluid
23.
There are over 100 different kinds of atoms these different atoms are known as ....................
a)
elements
b)
mixtures
c)
chemical bond
d)
chemistry
24.
When a molecule is made up of more than two different elements ( Example CO2) we call this .......................
a)
a mixture
b)
atom
c)
a compound
25.
A series of numbers and letters that are used to represent a molecule
a)
physcial property
b)
chemical property
c)
chemical formula
d)
atom
26.
Element or compound?
H2O
H2O
a)
element
b)
compound
27.
Which of the following is a compound?
a)
Co
b)
O2
c)
C
d)
CO2
28.
The blue numbers in the image below represent ________
a)
I don't know, and don't want to try
b)
coefficients
c)
subscripts
d)
none of the answers are correct
29.
How many atoms are there TOTAL in:
H2SO4
H2SO4
a)
6
b)
5
c)
7
d)
3
30.
What carries no charge
a)
Neutrons
b)
Electrons
c)
Protons
31.
The noble gases have how many valence electrons?
a)
1
b)
2
c)
7
d)
8
32.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
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