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Structure of Matter Test Review (2025)

Total questions: 49

Worksheet time: 25mins

Name
Class
Date
1.
1) Two or more elements chemically combined create a(n) ...
a)
element
b)
compound
c)
mixture
2.
2) Two or more substances physically combined create a(n)...
a)
element
b)
compound
c)
mixture
3.
3) A substance that can't be broken down any more and is made of only one type of atom is a(n)...
a)
element
b)
compound
c)
mixture
4.
4) Which of the following is NOT a pure substance?
a)
element
b)
compound
c)
mixture
5.
5) You find something that is shiny, flexible, and a good conductor of electricity. This is most likely...
a)
a metal
b)
a nonmetal
c)
a compound
6.
6) You can see the individual particles in a mixture of sand, salt, and iron that is not evenly mixed. What type of mixture is this?
a)
homogeneous
b)
heterogeneous
c)
alloy
7.
7) The elements that create salt combine together in a definite ratio so salt would be...
a)
an element
b)
a compound
c)
a mixture
8.
8) A mixture can be separated by physical means or physical changes.
a)
True
b)
False
9.
9) Salt will dissolve in water so we say that it is __________.
a)
soluble
b)
insoluble
c)
solvent
10.
10) Which of the following was NOT a method used to separate the mixture of sand, salt, and iron?
a)
filtering
b)
magnet
c)

tossing

11.
11) A lot of things dissolve into water which makes water a very good...
a)
solute
b)
solvent
c)
alloy
12.
12) An element is brittle and easily breaks. What type of element would it be?
a)
metal
b)
nonmetal
c)
metalloid
13.

13) Which of the following would be the best reason why lithium chloride is considered a compound?

a)
It is a pure substance made from elements that are chemically joined.
b)
It is not a pure substance made from different elements.
c)
It is created by a physical change of the elements that is caused by dissolving.
14.
14) A certain element is known as a "semiconductor" of electricity. What type of element is it?
a)
metal
b)
nonmetal
c)
metalloid
15.

15) Jo Jo takes some crystals and dissolves just a few in water so that they completely dissolve. The solution could have room for more to dissolve. What type of solution is it?

a)
unsaturated
b)
saturated
c)
supersaturated
16.
16) A group of students has heated and dissolved a lot of solute into a solution. Then it cools. They drop one more crystal in, and it all recrystallizes. What type of solution did they have?
a)
unsaturated
b)
saturated
c)
supersaturated
17.
17) Which scientist discovered electrons in an atom and called it "plum pudding"?
a)
Democritus
b)
Dalton
c)
Thomson
d)
Rutherford
e)
Bohr
18.
18) Which scientist discovered that electrons travel in certain paths called "energy levels"?
a)
Democritus
b)
Dalton
c)
Thomson
d)
Rutherford
e)
Bohr
19.
19) Which of the following is NOT a compound?
a)
salt
b)

Calcium

c)
water
20.
20) Who discovered the nucleus of the atom?
a)
Rutherford
b)
Dalton
c)
Thomson
21.
21) What is the modern view of the atom called (where electrons move in ever changing paths)?
a)
Electron Cloud Model
b)
Electron Capture Method
c)
Bohr's Model
d)
Newton's Model
22.
22) What part of an atom has a positive charge?
a)
proton
b)
neutron
c)
nucleus
d)
electron
23.
23) What part of an atom has no charge?
a)
proton
b)
neutron
c)
nucleus
d)
electron
24.
24) What part of an atom has a negative charge?
a)
proton
b)
neutron
c)
nucleus
d)
electron
25.
25) What part is at the center of an atom?
a)
proton
b)
neutron
c)
nucleus
d)
electron
26.

26) Which element from the periodic table has 33 protons?

a)
Lithium
b)
Neon
c)
Boron
d)

Arsenic

27.

27) Which element from the periodic table has a chemical symbol of W?

a)
Sodium
b)
Kalorium
c)

Tungsten

d)
Chlorine
28.

28) Which element from the periodic table has an atomic mass of 9.0122?

a)
Sulfur
b)
Oxygen
c)
Beryllium
d)
Carbon
29.
29) Which of the following best describes how to find the number of neutrons in an atom?
a)
Round the atomic mass and subtract the atomic number
b)
Round the atomic number and subtract the atomic mass
c)
Combine the atomic number and the atomic mass
d)
The atomic number is the number of neutrons.
30.

30) How many neutrons does a Titanium atom have?

a)
9
b)

26

c)
19
d)
29
31.
31) Which scientist was the first to create a periodic table organized by atomic mass?
a)
Mendeleev
b)
Moseley
c)
Einstein
d)
Newton
32.
32) Which scientist created the periodic table we now use that is organized by atomic number?
a)
Mendeleev
b)
Moseley
c)
Einstein
d)
Newton
33.
33) Which of the following is NOT a property of metals?
a)
luster
b)
malleable
c)
ductile
d)
poor conductors
34.
34) Which type of elements have some properties of both metals and non-metals?
a)
rare earth metals
b)
metalloids
c)
metal alloys
d)
gases
35.
35) Which group of elements is highly reactive to oxygen and water?
a)
halogens
b)
alkali metals
c)
metalloids
d)
noble gases
36.
36) Which group of elements combines easily with group 1 metals to form different types of salt?
a)
halogens
b)
alkali metals
c)
metalloids
d)
noble gases
37.
37) Which group of elements does not react very well at all with other elements?
a)
halogens
b)
alkali metals
c)
metalloids
d)
noble gases
38.

38) Of the elements cesium, rubidium, sodium, and beryllium -- which of them is NOT in the same GROUP as the others?

a)

cesium

b)
rubidium
c)

sodium

d)

beryllium

39.
39) If elements are in the same group of the periodic table, which of following is most likely to be true?
a)
They are all most likely metals.
b)
They all most likely have similar atomic masses.
c)
They all would have similar chemical properties.
40.
40) What is the maximum number of electrons in the outermost energy level of an atom?
a)
one
b)
two
c)
four
d)
eight
41.
41) The number of protons in an atom is known as the element's
a)
atomic number
b)
mass number
c)
atomic mass
d)
isotope
42.
42) Which of the following elements is NOT a noble gas?
a)
oxygen
b)
helium
c)
argon
d)
krypton
43.

43) If you were to draw a oxygen atom, which of the following would best describe it?

a)

8 protons and 8 neutrons in the nucleus, 2 electrons in the 1st level and 6 electrons in the second level

b)

8 protons and 8 neutrons in the nucleus, 8 electrons in the 1st level.

c)

8 protons and 9 neutrons in the nucleus, 2 electrons in the 1st level and 6 electrons in the 2nd level

d)

16 protons and 8 neutrons in the nucleus, 2 electrons in the 1st level and 6 electrons in the 2nd level

44.

44) If you were to draw a titanium atom, which of the following would best describe it?

a)

22 protons & 26 neutrons with 2 electrons in level 1, 8 electrons in level 2, 8 electrons in level 3, and 4 electrons in level 4.

b)

22 protons and 22 neutrons with 2 electrons in level 1, 8 electrons in level 2, and 12 electrons in level 3.

c)

22 protons and 23 neutrons with 2 electrons in level 1, 8 electrons in level 2, 8 electrons in level 3, and 4 electrons in level 4.

d)

22 protons and 44 neutrons with 2 electrons in level 1, 8 electrons in level 2, 8 electrons in level 3, and 4 electrons in level 4.

45.
45) Which of the following is NOT true about atoms?
a)
All matter is made of atoms.
b)
Atoms are the smallest particle into which an element can be divided and still be the same substance.
c)
Atoms are mostly empty space.
d)
Atoms of different elements are exactly the same.
46.
47) On the Periodic Table, periods are the _______ and groups are the ________.
a)
rows, columns
b)
rows, atomic numbers
c)
columns, rows
d)
columns, atomic numbers
47.
48) Elements in the same group have the same number of ________________
a)
outer protons
b)
electrons
c)
outer (valence) electrons
d)
electron energy clouds
48.
49) The table of elements creates a pattern in the chemical properties of elements. The repeating pattern can be described as ______________.
a)
periodic
b)
elemental
c)
valence
d)
atomic
49.
50) Students are looking at a solid in a petri dish. They see cube shapes happening over and over again. What happened?
a)
A physical process created a crystalline solid.
b)
A physical process created an amorphous solid.
c)
A chemical process created a crystalline solid.
d)
A chemical process created an amorphous solid.