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Ch. 7 Test

Total questions: 60

Worksheet time: 38mins

Name
Class
Date
1.

Have scientists always known exactly what an atom looks like, or have their theories changed over time?

a)

They have always known

b)

Their theories have changed

2.

Positively charged subatomic particle with a mass of 1 amu, located in the nucleus

a)

Proton

b)

Neutron

c)

Electron

3.

Negatively charged subatomic particle with a mass of 1/1,840 amu (very small), located in the cloud around the nucleus

a)

Proton

b)

Neutron

c)

Electron

4.

Subatomic particle with no charge, and a mass of 1 amu, located in the nucleus

a)

Proton

b)

Neutron

c)

Electron

5.

The center of the atom where the protons and neutrons are located

a)

Nucleus

b)

Electron cloud

c)

Proton zone

6.

In the picture, what does A represent?

a)

Proton

b)

Neutron

c)

Electron

7.

In the picture, what does B represent?

a)

Proton

b)

Neutron

c)

Electron

8.

In the picture, what does C represent?

a)

Proton

b)

Neutron

c)

Electron

9.

Which model required the discovery of the electron?

a)

A.

b)

B.

10.

How did Dalton describe an atom?

a)

like a solar system

b)

having a small dense nucleus

c)

like a tiny solid sphere

d)

having an electron cloud

11.

Which scientist described the location of electrons as specific circular paths around a nucleus?

a)

Bohr

b)

Dalton

c)

Democritus

d)

Einstein

12.

The first model of an atom resembled a ____.

a)

solar system

b)

chocolate chip cookie

c)

marble

d)

gold foil

13.
This model was developed after J.J. Thompson discovered electrons, a particle smaller than an atom. Is shows electrons floating freely in a positive space.
a)
The "Plum Pudding Model" of the atom
b)
The "Rutherford Model" of the atom
c)
Democritus's model of the atom
d)
The "Quantum Mechanical Model" of the atom
14.

This model added on to previous models by showing electrons existed at certain "energy levels". It is often called the Planetary Model.

a)
The "Bohr Model" of the atom
b)
The "Rutherford Model" of the atom
c)
The "Plumb Pudding Model" of the atom
d)
The "Quantum Mechanical Model" of the atom
15.
a)
Periods
b)
Groups
16.
a)
Periods
b)
Groups
17.
a)
Metals
b)
Nonmetals
c)
Metalloids
18.
a)
Metals
b)
Nonmetals
c)
Metalloids
19.
a)
Metals
b)
Nonmetals
c)
Metalloids
20.

What is the atomic number of Barium, Ba? (enlarge the periodic table)

a)

20

b)

38

c)

56

d)

88

21.

a row on the Periodic Table of Elements

a)

family

b)

period

c)

row

d)

isotope

22.

the mass of an atom, calculated by adding the number of protons and neutrons in the nucleus of the atom

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

23.

one or two letters that represent the name of an element

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

24.

the basic structural unit of matter

a)

atom

b)

matter

c)

element

d)

nucleus

25.

the positively charged subatomic particle contained in the nucleus of an atom

a)

proton

b)

neutron

c)

electron

d)

matter

26.

An element has the mass number 12 and atomic number 6. The number of neutrons in it is:

a)

6

b)

10

c)

4

d)

8

27.

Which item on this element square is the chemical symbol?

a)

Copper

b)

29

c)

Cu

d)

63.546

28.
What does the C represent?
a)
atomic mass
b)
atomic number
c)
element name
d)

the element's chemical symbol

29.
What does the 6 represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
30.

Who created the Periodic Table of elements?

a)

Mendeleev

b)

Bohr

c)

Rutherford

d)

Mrs. Mercier

31.

In a Covalent bond electrons are

a)

Shared

b)

Given

c)

Taken

d)

Given & Taken

32.

How many valance electrons does this atom have?

a)

1

b)

2

c)

3

d)

4

33.

In an Ionic bond electrons are

a)

Shared

b)

Given

c)

Taken

d)

Given & Taken

34.

Is this atom stable or unstable?

a)

Stable

b)

Unstable

35.

Is this atom stable or unstable?

a)

Stable

b)

Unstable

36.

How many electrons can the first electron shell hold?

a)

1

b)

2

c)

4

d)

8

37.

How many electrons can the second electron shell hold?

a)

1

b)

2

c)

4

d)

8

38.

Which reaction type produces only one product?

a)

Synthesis

b)

Decomposition

c)

Double Replacement

d)

Single Replacement

39.

Which reaction type starts with only one reactant?

a)

Synthesis

b)

Decomposition

c)

Double Replacement

d)

Single Replacement

40.

Which equations show synthesis reactions?

a)

Fe + S --> FeS

b)

2Mg + O2 --> 2MgO

c)

2Na + Cl2 --> 2NaCl

d)

C+O2 -- CO2

e)

H2CO3 --> H2O + CO2

41.

Which equations show decomposition reactions?

a)

4Fe + 3O2 --> 2Fe2O3

b)

CaCO3 --> CaO + CO2

c)

2KClO3 --> 2KCl + 3O2

d)

2H2O2 --> 2H20 +O2

e)

H2CO3 --> H2O + CO2

42.

Two oxygen atoms bond together, which vocabulary word best describes this type of matter?

a)

molecule

b)

compound

c)

element

d)

atom

43.

H2O is most accurately described as a ___________________.

a)

molecule

b)

compound

c)

element

d)

atom

44.

Which vocabulary words can be used to describe this image? (check all that apply)

a)

molecule

b)

compound

c)

element

d)

atom

45.

Oxygen, Nitrogen, Hydrogen, and Calcium are all examples of ______________________.

a)

molecules

b)

compounds

c)

atoms

d)

elements

46.

Which one of the following is a compound?

a)

NaCl

b)

O2

c)

Hydrogen

d)

He2

47.

What is a substance with unique physical and chemical properties that can't be reduced by chemical means.

a)

an element

b)

an atom

c)

a molecule

d)

a compound

48.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
49.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
50.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
51.
What is the only substance with a neutral pH of 7?
a)
Milk
b)
Orange Juice
c)
Water
d)
Blood
52.
Which solution releases H+ in solution?
a)
Base
b)
Acid
c)
Buffer
d)
Water
53.
A solution with a pH of 3.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
54.
A solution with a pH of 8.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
55.
This substance releases OH- into solution
a)
Acid
b)
Base
c)
Neutral
56.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
57.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
58.
Tastes bitter.
a)
Acids
b)
Bases
c)
Salts
d)
All
59.
Feels slippery.
a)
Acids
b)
Bases
c)
All
60.

What is created when an acid and base are combined?

a)

Water only

b)

Salt only

c)

Water and salt

d)

A gas

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