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Chapter 9 Review

Total questions: 52

Worksheet time: 2hrs 5mins

Name
Class
Date
1.

Which scientist discovered the electrons?

a)

Dalton

b)

Thomson

c)

Atristotle

d)

Bohr

2.

What is a particle with one negative charge called?

a)

electron

b)

proton

c)

quark

d)

neutron

3.

The smallest particle of an element that still represents that element.

a)

Nucleus

b)

electron

c)

proton

d)

atom

4.

What is a particle with one positive charge called?

a)

proton

b)

electron

c)

neutron

d)

quark

5.

What is the neutral particle found in the nucleus called?

a)

proton

b)

neutron

c)

electron

d)

quark

6.

What is the center of an atom called?

a)

nucleus

b)

electron cloud

c)

proton center

d)

photon center

7.

What was the name of the Greek philosopher who first came up with the idea of atoms or atomos?

a)

Aristotle

b)

Socrates

c)

Dalton

d)

Democritus

8.

Which of the following was NOT one of John Dalton's notions about atoms?

a)

All matter is made up of atoms

b)

All atoms of a given element are identical

c)

Atoms combine in whole ratios to make compounds

d)

In chemical reactions, atoms are created or destroyed

9.

Which scientist performed the cathode ray tube experiment?

a)

John Dalton

b)

J.J. Thomson

c)

Robert Millikan

d)

Ernest Rutherford

10.

Which scientist performed the Gold Foil experiment?

a)

John Dalton

b)

J.J. Thomson

c)

Robert Millikan

d)

Ernest Rutherford

11.

In the cathode ray tube experiment, the particles moved TOWARD the ______________ plate.

a)

positive

b)

negative

12.

The cathode ray tube helped to identify that atoms __________.

a)

have tiny negative particles

b)

have a dense core nucleus

c)

charge and mass of a single electron

d)

have positive particles in the nucleus

13.

Which Scientist performed the oil drop experiment?

a)

John Dalton

b)

J.J Thomson

c)

Robert Millikan

d)

Ernest Rutherford

14.

The oil drop experiment helped to identify __________.

a)

tiny negative particles

b)

a dense core nucleus

c)

charge and mass of a single electron

d)

positive particles in the nucleus

15.

Thomson developed the model of the atom known as...

a)

the plum pudding model

b)

the bohr model

c)

the electron cloud model

16.

Which of the following is not true of the Plum Pudding Model of the atom?

a)

electrons have a negative charge

b)

protons and neutrons are in the nucleus

c)

atoms are neutral

d)

spherical cloud of positive charge

17.

What surprising result occurred in the gold foil experiment?

a)

all of the alpha particles went through the gold screen

b)

some of the alpha particles were repelled by the gold screen

c)

the particles bent toward the positive plate

d)

the alpha particles were absorbed in the gold foil

18.

99.999% of the atom is....

a)

Protons

b)

Neutrons

c)

Electrons

d)

Empty Space

19.

What scientist developed the model of the atom where the protons and neutrons are in the nucleus and electrons are outside the nucleus in orbitals?

a)

Thomson

b)

Rutherford

c)

Bohr

d)

Schrodinger

20.

What scientist developed the electron cloud model?

a)

Thomson

b)

Rutherford

c)

Bohr

d)

Schrodinger

21.

Which of the following are located in the nucleus?

a)

protons and neutrons

b)

electrons and protons

c)

neutrons and electrons

22.

"28" represents the...

a)

average atomic mass

b)

symbol

c)

name

d)

atomic number

23.

"58.693" represents the...

a)

average atomic mass

b)

symbol

c)

name

d)

atomic number

24.

"Nickel" represents the...

a)

average atomic mass

b)

chemical symbol

c)

element name

d)

atomic number

25.

"Ni" represents the...

a)

average atomic mass

b)

chemical symbol

c)

element name

d)

atomic number

26.
What quantities vary between isotopes of an element?
a)
protons, electrons, and atomic mass
b)
protons, electrons, and atomic number
c)
neutrons and electrons
d)
neutrons and atomic mass
27.
How many neutrons in C-14?
a)
6
b)
7
c)
14
d)
8
28.
Isotopes are atoms of the same element with different #’s of __________ & therefore different __________.
a)
n0 ;  atomic #’s
b)
p+ ; atomic #’s
c)
e- ; atomic masses
d)
n0 ; atomic masses
29.
An atom is electrically neutral when
a)
protons and neutrons are the same
b)
protons and electrons are the same
c)
neutrons and electrons are the same
d)
neutrons balance the protons and electrons
30.
Two isotopes of carbon are carbon-12 and carbon-14.  These isotopes differ from one another by two protons.
a)
true
b)
false
31.
If the number of electrons in an atom changes you make a(n) __________________.
a)
ion
b)
isotope
c)
new element
d)
isomer
32.
Ions are: 
a)
atoms with a positive or negative charge
b)
atoms with no charge
c)
atoms with ONLY a positive charge
d)
atoms with ONLY a negative charge
33.
How many neutrons does a Sodium 24 isotope have?
a)
12
b)
13
c)
14
d)
15
34.
How many neutrons does a Carbon 13 atom have?
a)
6
b)
5
c)
7
d)
8
35.
How many neutrons does a Calcium 48 isotope have?
a)
16
b)
20
c)
28
d)
12
36.

Isotopes of an element have a different number of...

a)

Protons

b)

Neutrons

c)

Electrons

d)

Mass

37.

What is a positive ion called?

a)

anion

b)

cation

c)

isotope

d)

covalent

38.

What is a negative ion called?

a)

anion

b)

cation

c)

covalent

d)

isotope

39.

If an atom loses electrons, the charge will be positive.

a)

true

b)

false

40.

A Bromine ion gains 1 electron, which of the following is the correct symbol for a Bromine ion?

a)

Br-1

b)

Br+1

c)

Br+7

d)

Br-7

41.
This particle determines what element you have - the elements identity.
a)
electron
b)
proton
c)
neutron
d)
valence shell
42.
Which particles make up the nucleus of an atom?
a)
protons and neutrons
b)
electrons and protons
c)
electrons, protons, and neutrons
d)
electrons and neutrons
43.
What makes something radioactive?
a)
elements with an atomic number above 81
b)
an unstable nucleus
c)
contaminated sewage
d)
It decays over time
44.

Which type of radiation releases an electron?

a)

Alpha radiation

b)

Beta radiation

c)

Gamma radiation

d)

Theta radiation

45.

What particle is released when an unstable isotope undergoes alpha radiation?

a)

alpha particle

b)

an electron

c)

a photon of light

d)

beta particle

46.
What is emitted during Gamma Radiation?
a)
Particles.
b)
Protons
c)
Beta Rays.
d)
Gamma Rays.
47.
TRUE or FALSE: gamma changes the atomic number.
a)
True
b)
False
48.
Alpha makes the atomic number decrease by how many? 
a)
1
b)
2
c)
3
d)
5
49.

Uranium has an atomic number of 92, when it undergoes alpha decay it becomes which element?

a)

Protactinium

b)

Neptunium

c)

Thorium

d)

Plutonium

50.

A carbon atom undergoes beta decay. When this occurs, it becomes what element?

a)

Oxygen

b)

Nitrogen

c)

Boron

d)

Beryllium

51.

An atom with an atomic number of 88 undergoes alpha decay. When this occurs, its new atomic number is ____________

a)

90

b)

89

c)

87

d)

86

52.

Uranium has an atomic number of 92. When it undergoes gamma decay, its atomic number is ______.

a)

90

b)

91

c)

92

d)

93

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