WorksheetsChemistry
Total questions: 36
Worksheet time: 39mins
Name
Class
Date
1.
An atom’s mass number is 210 and its atomic number is 85. How many neutrons does the atom have?
a)
85
b)
125
c)
210
d)
295
2.
How many total atoms are represented in the formula CO 3?
a)
three
b)
four
c)
five
d)
six
3.
The diagram below shows what happens during the formation of a compound. The diagram shows two substances joining together to form a third substance.
Which of these substances is a compound?
a)
A
b)
B
c)
C
d)
both B and C
4.
What can group numbers on the periodic table help you determine?
a)
the number of neurtrons
b)
the number of total electrons
c)
the number of protons
d)
the number of valence electrons
5.
Which group of elements would NOT react with another element because they have eight electrons in their outmost shell?
a)
Group 1 - Alkali Metals
b)
roup 7 - Transition Metals
c)
roup 16 - Oxygen Family
d)
Group 18 - Noble Gases
6.
The portion of the diagram labeled 4 is
a)
the nucleus
b)
an electron
c)
a proton
d)
a neurtron
7.
Belinda makes a sugar solution, as shown below.
How much sugar did Belinda dissolve in the water?
How much sugar did Belinda dissolve in the water?
a)
9 grams
b)
11 grams
c)
13 grams
d)
17 grams
8.
Ted wants to know the average atomic mass of calcium. He knows that the letters Ca stand for calcium. He found the entry for calcium, Ca, in Period 4 of the periodic table. The diagram below shows this
Which of the following numbers should Ted identify as the average atomic mass of calcium, Ca?
entry.
Which of the following numbers should Ted identify as the average atomic mass of calcium, Ca?
entry.
a)
4
b)
20
c)
60.078
d)
40.078
9.
The portion of the diagram labeled 3 is
a)
the nucleus
b)
an electron
c)
a proton
d)
a neutron
10.
Some compounds are classified as acids or bases. The pH scale shows how acidic or how basic these compounds are. The lower the pH, the more acidic a compound is. The higher the pH, the more basic it is. Sodium hydroxide, a compound commonly
found in drain cleaners, has a pH of 13.
Which of these phrases describes sodium hydroxide?
found in drain cleaners, has a pH of 13.
Which of these phrases describes sodium hydroxide?
a)
highly acidic
b)
highly basic
c)
slightly acidic
d)
slightly basic
11.
Find chlorine and bromine in this section of the periodic table.
What is true about these two elements?
What is true about these two elements?
a)
They are both metalloids.
b)
They are in the same group.
c)
They have the same average atomic mass.
d)
They are in the same period.
12.
When reactants chemically bond, what happens to their atoms?
a)
atoms are lost
b)
atoms are destroyed
c)
atoms are gained
d)
atoms are rearranged
13.
The particles of a ____________________ are far apart.
a)
solid
b)
liquid
c)
gas
d)
all of these answers
14.
Looking at this model and your periodic table determine what element it is. (1 point) _________________
a)
Boron
b)
Lithium
c)
Beryllium
d)
Nitrogen
15.
Which of the following equations is balanced?
a)
3N2 + 2H2 --> 3NH3
b)
N2 + 2H2 --> 2NH3
c)
2N2 + H2 --> 3NH3
d)
N2 + 3H2 --> 2NH3
16.
The term for the smallest particle of an element that has the properties of that element is
a)
proton
b)
an atom
c)
a molecule
d)
an element
17.
What do atoms gain, lose or share when they bond?
a)
protons
b)
electrons
c)
neutrons
d)
nucleus
18.
Marco tears a piece of notebook paper into smaller pieces, as shown below.
Tearing paper into pieces is an example of which kind of change?
Tearing paper into pieces is an example of which kind of change?
a)
change in mass
b)
physical change
c)
chemical change
d)
change in energy
19.
The number or protons is equal to the number of _____________.
a)
neutrons
b)
electrons
c)
atoms
d)
orbitals
20.
The portion of the diagram labeled 2 is
a)
nucleus
b)
electron
c)
proton
d)
neutron
21.
Trini adds 10 g of baking soda to 100 g of vinegar. The mixture begins to bubble. When the bubbling stops, Trini finds the mass of the resulting mixture. She determines its mass is 105 g. Why has the mass changed?
a)
A gas has formed and left the mixture.
b)
Vinegar evaporated during the experiment.
c)
Mixtures always are less massive than their parts.
d)
Mass was destroyed when vinegar reacted with baking soda.
22.
Carbon has an atomic number of 6. Which of the following does the atomic number 6 tell you about carbon?
a)
the number of protons in a carbon atom
b)
the average atomic mass of a carbon atom
c)
the group number of carbon
d)
the period number of carbon
23.
The periodic table has a lot of information in the form of letters and numbers. The information is organized into boxes, which are placed in rows and stacked in columns. Which of the following does each box represent?
a)
compound
b)
an element
c)
a group
d)
a period
24.
Matter can undergo physical and chemical changes. A physical change is a change of matter from one form to another without a change in chemical properties. Which process is an example of a physical change?
a)
ice melting
b)
wood burning
c)
reaction with vinegar and baking soda
d)
photosynthesis
25.
The portion of the diagram labeled 1 is
a)
nucleus
b)
electron
c)
proton
d)
neutron
26.
Which process represents a chemical change?
a)
A lake freezes over into ice.
b)
Vinegar bubbles when baking soda is added.
c)
A metal bar is rolled into a flat sheet.
d)
Sand, water, and salt combine to form a mixture.
27.
Mass divided by volume is used to calculate
a)
density
b)
force
c)
pressure
d)
elements
28.
Which of these is a chemical property of a sheet of paper?
a)
The paper does not conduct electricity.
b)
The paper can be crumpled.
c)
The paper does not attract a magnet.
d)
The paper can be burned.
29.
Copper, gold, and iron all have some of the same characteristic properties. They are all shiny, and they conduct electricity. They can be hammered into a shape and drawn into a wire. What classification of elements includes copper, gold, and iron?
a)
gas
b)
metal
c)
nonmetal
d)
metalloid
30.
What is the mass number of an atom that has 4 protons, 4 electrons, and 5 neutrons?
a)
4
b)
9
c)
5
d)
13
31.
An example of a chemical change would include.
a)
glass breaking
b)
fireworks exploding
c)
ice meltin
d)
paper folding
32.
An example of a physical change would include.
a)
candle burning
b)
sugar dissolving
c)
reaction of vinegar and baking soda
d)
an apple rotting
33.
The mass of a gummy bear is 25 grams. It's volume is measured to be 5 cm³.
D=M/V
What is the density of the gummy bear?
D=M/V
What is the density of the gummy bear?
a)
5
b)
25
c)
3
d)
15
34.
Which of the pictures shows molecules in the state of a solid?
a)
a
b)
b
c)
c
35.
Which of the pictures shows molecules in the state of a liquid?
a)
a
b)
b
c)
c
36.
Which of the pictures shows molecules in the state of a gas?
a)
a
b)
b
c)
c
100 %
