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Atomic Structure, Elements, Compounds, and Mixtures

Total questions: 93

Worksheet time: 2hrs 43mins

Name
Class
Date
1.

The atomic number identifies the number of __________.

a)

electrons

b)

atoms

c)

protons

d)

neutrons

2.

Subatomic particles that have a negative charge

a)

electrons

b)

protons

c)

quarks

d)

neutrons

3.

The number 16 for the atomic element sulfur is the

a)

ionic number

b)

isotope

c)

atomic mass

d)

atomic number

4.

How many protons does sulfur have?

a)

32

b)

16

c)

48

d)

12

5.

How many electrons does sulfur have

a)

16

b)

32

c)

48

d)

12

6.

The name of this particle means indivisible and it is the building block of matter

a)

molecule

b)

compound

c)

atom

d)

isotope

7.

Subatomic particle that has a positive charge

a)

electron

b)

poitron

c)

neutron

d)

proton

8.

The center of an atom is called the ________________.

a)

electron cloud

b)

nucleus

c)

neutrion

d)

nuetron

9.

In what part of an atom can the protons and neutrons be found?

a)

nucleus

b)

neutrine

c)

electron cloud

d)

proton cloud

10.

In an atom, the number of protons is equal to the number of ____________.

a)

energy levels

b)

neutrons

c)

neurons

d)

electrons

11.

Which parts of the atom move around the nucleus?

a)

electrons

b)

protons

c)

electrode particles

d)

neutrons

12.

What type of charge does a proton have?

a)

positive

b)

negative

c)

neutral

13.

What charge does an electron have?

a)

positive

b)

neutral

c)

negative

14.

Lucky Charms Cereal

a)

Compound

b)

Element

c)

Mixture

15.

Chocolate Chip Muffin

a)

Compound

b)

Element

c)

Mixture

16.

Koolaid

a)

Compound

b)

Element

c)

Mixture

17.

Mg

a)

Compound

b)

Element

c)

Mixture

18.

Salt (NaCl)

a)

Compound

b)

Element

c)

Mixture

19.

What type of mixture is trail mix?

a)

compound

b)

heterogeneous

c)

homogeneous

20.

What type of mixture is salsa

a)

compound

b)

heterogeneous

c)

homogeneous

21.
A substance that contains only one type of atom is a(n)
a)
compound
b)
element
c)
heterogeneous mixture
d)
homogeneous mixture
22.
A mixture that appears to be evenly mixed throughout:
a)
an atom
b)
a compound
c)
a homogeneous mixture
d)
a heterogeneous mixture
23.

A mixture that does NOT appear to be evenly mixed throughout is ______.

a)

an atom

b)

a compound

c)

a homogeneous mixture

d)

a heterogeneous mixture

24.
If an unknown substance CANNOT be broken down into simpler substances, it is 
a)
a compound
b)
an element
c)
a homogeneous mixture
d)
a heterogeneous mixture
25.
A substance made of only one type of atom is called —
a)
an element
b)
a mixture
c)
a compound
d)
a salt
26.
Which of the following is an element?
a)
Sugar
b)
Salt
c)
Water
d)
Oxygen
27.

Two characteristics of Matter are:

a)

Has volume and is energy

b)

Has mass and is energy

c)

Has mass and volume

d)

Doesn't take up space and is not energy

28.
The air is a _________. 
a)
element 
b)
mixture 
c)
compound 
d)
energy 
29.
Examples are milk and gasoline.
a)
elements
b)
mixtures
c)
compounds
30.
You are eating a pizza. What type of mixture are you consuming?
a)
homogeneous
b)
heterogeneous
c)
pure substance
d)
The Periodic Table
31.
Italian Salad Dressing is a . . .
a)
heterogeneous mixture
b)
homogeneous mixture
c)
Pure Substance
d)
Compound
32.
Of these mixtures, which one is a solution?
a)
A
b)
B
c)
C
d)
D
33.

Ba

a)

Compound

b)

Element

c)

Mixture

34.
a)
Element
b)
Compound
c)
Mixture
35.
a)
Element
b)
Compound
c)
Mixture
36.
a)
Element
b)
Compound
c)
Mixture
37.
a)
Element
b)
Compound
c)
Mixture
38.
a)
Element
b)
Compound
c)
Mixture
39.

A pure substance that cannot be broken down into any other substance.

a)

Elements

b)

Compounds

c)

Mixtures

40.

Fe is the ___________________ for iron

a)

Letters

b)

Chemical Symbol

c)

Equation

41.

A(n) ______________ is formed when two or more elements chemically combine.

a)

Compound

b)

Element

c)

Mixture

42.

A ___________ is a combination of many different elements not chemically combined.

a)

Element

b)

Compound

c)

Mixture

43.
Which of these is a pure substance?
a)
bread
b)
table salt
c)
garden soil
d)
sea water
44.
Which of the following is NOT a pure substance?
a)
milk
b)
oxygen
c)
water
d)
carbon dioxide
45.
Which of the following is a way in which elements and compounds are similar?
a)
Elements and compounds are pure substances.
b)
Elements and compounds are both made up of different kinds of atoms.
c)
Elements and compounds can both be broken down by physical means.
d)
Elements and compounds are listed on the periodic table.
46.

Brass is a metal that is bright red and gold. It is formed by combining, not chemically, two elements, zinc and copper. Based on the information, how would brass be classified?

a)

an element

b)

compound

c)

mixture

d)

suspension

47.
This diagram represents a _____.
a)
pure substance that is a compound
b)
mixture of elements
c)
pure substance that is an element
d)
mixture of compounds
48.

A student placed a small chip of limestone into a hydrochloric acid solution, and carbon dioxide gas was released. The carbon dioxide provided evidence that

a)

only a physical change occurred.

b)

a chemical change occurred.

c)

only a loss of mass occurred.

d)

the formation of an element occurred.

49.

Humans absorb oxygen from the air they breathe in and exhale carbon dioxide gas, CO2. Carbon dioxide gas is

a)

an element made of carbon and oxygen atoms.

b)

a solution made of carbon and oxygen atoms.

c)

a compound of carbon and oxygen atoms.

d)

a mixture of carbon and oxygen atoms.

50.

What type of change is this?

a)

Chemical

b)

Melting

c)

Evaporation

d)

Condensation

e)

Sublimation

51.

What makes elements and compounds different from mixtures? Elements & compounds-

a)

have a constant composition (pure substances)

b)

are made of gases

c)

Will not change when heated

d)

conduct electric current

52.

In the diagrams provided, the circles of different colors represent the atoms of different elements. Which diagram represents a mixture?

a)

I

b)

II

c)

III

d)

IV

53.

Mixtures are different than pure substances because mixtures-

a)

have lower boiling points

b)

can be separated physically

c)

are less dense than pure substances

d)

contain only one type of atom

54.

Lucky Charms Cereal

a)

Compound

b)

Element

c)

Mixture

55.

Chocolate Chip Muffin

a)

Compound

b)

Element

c)

Mixture

56.

Koolaid

a)

Compound

b)

Element

c)

Mixture

57.

Mg

a)

Compound

b)

Element

c)

Mixture

58.

Salt (NaCl)

a)

Compound

b)

Element

c)

Mixture

59.

What type of mixture is trail mix?

a)

compound

b)

heterogeneous

c)

homogeneous

60.

What type of mixture is salsa

a)

compound

b)

heterogeneous

c)

homogeneous

61.
A substance that contains only one type of atom is a(n)
a)
compound
b)
element
c)
heterogeneous mixture
d)
homogeneous mixture
62.
A mixture that appears to be evenly mixed throughout:
a)
an atom
b)
a compound
c)
a homogeneous mixture
d)
a heterogeneous mixture
63.

A mixture that does NOT appear to be evenly mixed throughout is ______.

a)

an atom

b)

a compound

c)

a homogeneous mixture

d)

a heterogeneous mixture

64.
If an unknown substance CANNOT be broken down into simpler substances, it is 
a)
a compound
b)
an element
c)
a homogeneous mixture
d)
a heterogeneous mixture
65.
A substance made of only one type of atom is called —
a)
an element
b)
a mixture
c)
a compound
d)
a salt
66.
Which of the following is an element?
a)
Sugar
b)
Salt
c)
Water
d)
Oxygen
67.

Two characteristics of Matter are:

a)

Has volume and is energy

b)

Has mass and is energy

c)

Has mass and volume

d)

Doesn't take up space and is not energy

68.
The air is a _________. 
a)
element 
b)
mixture 
c)
compound 
d)
energy 
69.
Examples are milk and gasoline.
a)
elements
b)
mixtures
c)
compounds
70.
You are eating a pizza. What type of mixture are you consuming?
a)
homogeneous
b)
heterogeneous
c)
pure substance
d)
The Periodic Table
71.
Italian Salad Dressing is a . . .
a)
heterogeneous mixture
b)
homogeneous mixture
c)
Pure Substance
d)
Compound
72.
Of these mixtures, which one is a solution?
a)
A
b)
B
c)
C
d)
D
73.

Ba

a)

Compound

b)

Element

c)

Mixture

74.

Who created the periodic table of elements?

a)

John Dalton

b)

Hennig Brand

c)

Antoine Lavoisier

d)

Dmitri Mendeleev

75.

An element is identified by

a)

its number of protons.

b)

the atomic mass.

c)

the type of charge.

d)

its number of isotopes.

76.

Each of the elements in the periodic table has a specific number. What does this number represent?

a)

the half-life

b)

the number of neutrons

c)

the number of protons

d)

the number of isotopes

77.

The number of protons and neutrons in the atom is its

a)

atomic mass.

b)

atomic number.

c)

atomic power.

d)

atomic clock.

78.

The element sodium appears like this in the periodic table. Which is its chemical symbol?

a)

11

b)

Na

c)

sodium

d)

22.990

79.

The chemical formula for baking soda is NaHCO3. How many different elements make up baking soda?

a)

1

b)

2

c)

3

d)

4

80.

How are elements ordered in the modern periodic table?

a)

by date of discovery

b)

by decreasing atomic mass

c)

by increasing atomic number

d)

by alphabetical order of element symbols

81.

The periodic table contains rows and columns. What are the horizon rows called?

a)

groups

b)

families

c)

columns

d)

periods

82.

How many periods does the periodic table contain?

a)

7

b)

8

c)

9

d)

10

83.

What are the columns of the periodic table called?

a)

periods

b)

rows

c)

tables

d)

groups or families

84.

How many groups does the periodic table contain?

a)

2

b)

3

c)

18

d)

32

85.

Properties such as magnetism, luster, and malleability have been used to group together which category of elements on the periodic table?

a)

metals

b)

nonmetals

c)

metaloids

d)

noble gases

86.

What general category describes the majority of the elements in the periodic chart?

a)

metals

b)

liquids

c)

nonmetals

d)

gases

87.

If a highly-reactive metal with one valence electron is discovered, in which group would the element best fit?

a)

group 1

b)

group 2

c)

group 17

d)

group 18

88.

Electrons located in an atom's outer most electron shell.

a)

electrolysis

b)

valence electrons

c)

electronics

d)

election

89.

Which statement best explains how periods on the periodic table are organized?

a)

increasing atomic number from left to right

b)

increasing number of neutrons from left to right

c)

decreasing number of electrons from left to right

d)

decreasing atomic mass number from left to right

90.

In which groups did Mendeleev most likely place highly-reactive elements?

a)

group 1 (IA) and group 17 (VIIA)

b)

group 1 (IA) and group 18 (VIIIA)

c)

group 2 (IIA) and group 18 (VIIIA)

91.

Which best explains how the periodic table is used to identify properties of elements?

a)

by the color and shape of the elements

b)

by the number of electrons in the elements

c)

by the group in which the elements are located

92.

An engineer needs a hard, non-magnetic semiconductor. Which element would best fit this description?

a)

aluminum (Al)

b)

carbon (C)

c)

silicon (Si)

d)

silver (Ag)

93.

Why does reactivity in non-metals most likely increase from left to right in the periodic table?

a)

atomic radius increases

b)

attraction for electrons increase

c)

attraction for electrons decreases

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