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8th Unit 3 Review

Total questions: 86

Worksheet time: 3hrs 52mins

Name
Class
Date
1.

What is the charge of a proton?

a)

Negative

b)

Positive

c)

Neutral

d)

Variable

2.

Which scientist is known for the discovery of the electron?

a)

Niels Bohr

b)

J.J. Thomson

c)

Ernest Rutherford

d)

John Dalton

3.

What is the electron configuration for the element oxygen (O)?

a)

1s22s22p41s^2 2s^2 2p^4

b)

1s22s22p61s^2 2s^2 2p^6

c)

1s22s23p41s^2 2s^2 3p^4

d)

1s22p63s21s^2 2p^6 3s^2

4.

Which of the following elements has the largest atomic radius?

a)

Helium

b)

Lithium

c)

Sodium

d)

Potassium

5.

Which of the following is a physical property of elements?

a)

Reactivity with water

b)

Melting point

c)

Ability to form compounds

d)

Flammability

6.

What is the main idea of Dalton's atomic theory?

a)

Atoms are indivisible and indestructible particles.

b)

Atoms contain a dense nucleus.

c)

Electrons orbit the nucleus in fixed paths.

d)

Atoms are mostly empty space.

7.

Which of the following elements is most likely to form a cation?

a)

Chlorine

b)

Oxygen

c)

Sodium

d)

Nitrogen

8.

Explain why elements in the same group of the periodic table have similar chemical properties.

a)

They have the same number of protons.

b)

They have the same number of valence electrons.

c)

They have the same atomic mass.

d)

They have the same number of neutrons.

9.

Which scientist proposed the planetary model of the atom?

a)

J.J. Thomson

b)

Niels Bohr

c)

Ernest Rutherford

d)

John Dalton

10.

What is the trend in electronegativity across a period in the periodic table?

a)

It decreases.

b)

It increases.

c)

It remains constant.

d)

It fluctuates.

11.

Which of the following is a chemical property of elements?

a)

Density

b)

Color

c)

Reactivity with acid

d)

Boiling point

12.

Describe the process of how an atom becomes an ion.

a)

By gaining or losing protons

b)

By gaining or losing electrons

c)

By gaining or losing neutrons

d)

By splitting into smaller atoms

13.

Which of the following best explains why noble gases are inert?

a)

They have a full outer electron shell.

b)

They have high atomic masses.

c)

They have low melting points.

d)

They have high densities.

14.

What is the significance of the periodic law in the periodic table?

a)

It states that elements are arranged by increasing atomic mass.

b)

It states that elements are arranged by increasing atomic number.

c)

It states that elements are arranged by decreasing atomic number.

d)

It states that elements are arranged by decreasing atomic mass.

15.

Who was the first to claim that all matter is made of indivisible particles called atomos?

a)

John Dalton

b)

J.J. Thomson

c)

Democritus

d)

Ernest Rutherford

16.

What did John Dalton find about the mass of elements before and after chemical changes?

a)

It increased

b)

It decreased

c)

It remained consistent

d)

It was unpredictable

17.

Which of the following is NOT one of John Dalton's claims in his Atomic Theory?

a)

A) All matter is made of indivisible atoms

b)

B) Atoms can be created and destroyed

c)

C) Atoms of the same element are identical

d)

D) Chemical reactions are rearrangements of atoms

18.

What did J.J. Thomson conclude about the particles in the cathode ray?

a)

They are positively charged

b)

They are neutral

c)

They are negatively charged

d)

They have no charge

19.

What was the main conclusion of Ernest Rutherford's Gold Foil Experiment?

a)

Atoms are solid

b)

Atoms are mostly empty space

c)

Atoms are liquid

d)

Atoms are flexible

20.

What did Ernest Rutherford discover in 1917?

a)

Neutron

b)

Electron

c)

Proton

d)

Photon

21.

Which of the following was NOT a part of John Dalton's Atomic Theory?

a)

A) Atoms can be divided into smaller parts

b)

B) Atoms of different elements are different

c)

C) Atoms join to form compounds

d)

D) Atoms are indivisible

22.

Who was able to prove there were particles that are much smaller than any known atom?

a)

Democritus

b)

John Dalton

c)

J.J. Thomson

d)

Ernest Rutherford

23.

What did Rutherford's Gold Foil Experiment reveal about the structure of the atom?

a)

Atoms are solid

b)

Atoms have a dense nucleus

c)

Atoms are liquid

d)

Atoms are flexible

24.

Who adjusted Rutherford's model by giving electrons specific orbits around the nucleus?

a)

Niels Bohr

b)

James Chadwick

c)

Erwin Schrödinger

d)

Werner Heisenberg

25.

What did James Chadwick discover about atomic nuclei?

a)

They contain electrons

b)

They contain neutrons

c)

They have a positive charge

d)

They are empty.

26.

What is the modern atomic model considered to be?

a)

Perfect

b)

An imperfect representation

c)

Completely accurate

d)

A myth

27.

What is a characteristic of scientific theories and models?

a)

They never change

b)

They are based on new evidence

c)

They are fictional

d)

They are myths.

28.

What is the main idea behind the Bohr model of the atom?

a)

Electrons are scattered randomly

b)

Electrons orbit the nucleus in fixed paths

c)

Electrons are stationary

d)

Electrons are inside the nucleus

29.

What did the discovery of the neutron help to explain?

a)

The charge of the atom

b)

The mass of the atom

c)

The color of the atom

d)

The shape of the atom

30.

Which of the following best describes the nature of scientific theories?

a)

They are guesses that scientists make.

b)

They are unchangeable facts.

c)

They are well-substantiated explanations based on evidence.

d)


They are opinions of scientists.

31.

Which of the following is a characteristic of a scientific theory?

a)


It is based on personal beliefs.

b)

It is supported by a large body of evidence.

c)


It is a random guess.

d)

It is not testable.

32.

In a neutral atom,

a)

protons = electrons

b)

protons = neutrons

c)

neutrons = electrons

d)

protons = neutrons = electrons

33.

At what part of the atom is the arrow pointing?

a)

proton

b)

neutron

c)

electron

d)

nucleus

34.

At what part of the atom is the arrow pointing?

a)

proton

b)

neutron

c)

electron

d)

nucleus

35.

At what part of the atom is the arrow pointing?

a)

Cloud

b)

energy level

c)

electron

d)

neutron

36.

At what part of the atom is the arrow pointing?

a)

electron

b)

neutron

c)

proton

d)

nucleus

37.

At what part of the atom is the arrow pointing?

a)

nucleus

b)

energy level

c)

electron

d)

proton

38.

The vertical (up and down) columns in the Periodic Table are called

a)

groups

b)

towers

c)

periods

d)

atomic numbers

39.
The Modern Periodic Table of Elements is arranged by
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
40.
Sodium (Na) is found in period 
a)
3
b)
2
c)
4
d)
1
41.
Sodium (Na) is found in group 
a)
1
b)
2
c)
3
d)
4
42.
The atomic number tells you what?  READ THE ANSWERS CAREFULLY
a)
only the number of electrons
b)
 only the number of protons
c)
only the number of neutrons
d)
the number of both electrons and protons in an atom.
43.
What does the atomic mass tell you? 
a)
Basically,the number of electrons and protons
b)
The number of neutrons
c)
Basically, the number of protons and neutrons
d)
The number of protons.
44.
What does the 6 represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
45.
What does 12.011 represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
46.
These are found on the Periodic Table.
a)
Compounds
b)
Elements
c)
Mixtures
47.

The horizontal (side to side) rows in the Periodic Table are called

a)

groups

b)

families

c)

periods

d)

atomic numbers

48.

A subatomic particle that has a positive charge and that is found in the nucleus of an atom

a)

Proton

b)

elecrtron

c)

groups

d)

neutrons

49.

A subatomic particle that has a negative charge

a)

nobles gases

b)

protons

c)

electrons

d)

neutrons

50.

What changes when an atom becomes an ion?

a)

The number of electrons

b)

The number of protons

c)

The number of neutrons

d)

Both the number of neutrons and electrons

51.

How many neutrons does this bromine atom have?

a)

35

b)

45

c)

80

d)

115

52.

How many electrons does this magnesium ion have?

a)

24

b)

12

c)

10

d)

14

53.

What happened to this Magnesium atom to make it an ion?

a)

It LOST electrons

b)

It GAINED electrons

c)

It GAINED protons

d)

It LOST protons

54.

What is the atomic number of this element?

a)

12

b)

24

c)

23

d)

35

55.

Adding or subtracting neutrons makes the element change into

a)

an ion

b)

a mixture

c)

an isotope

d)

a neutral atom

56.

What is the charge on a lithium atom that loses 1 electron?

a)

+1

b)

0

c)

-1

d)

-2

57.
An ion forms when an atom gains or loses
a)
Protons
b)
Neutrons
c)
Electrons
58.
A neutral atom would become an ion that has a charge of 2+ by 
a)
Losing two protons
b)
Losing two neutrons
c)
Losing two electrons
59.
Two atoms that have different numbers of protons are 
a)
Different ions
b)
Different isotopes
c)
Different elements
60.
Which phrase describes two atoms that are isotopes
a)
Same mass number, same atomic number
b)
Same mass number, different atomic number
c)
Different mass number, same atomic number
d)
Different mass number, different atomic number
61.
An ion that has a negative charge is formed when an atom 
a)
Loses neutrons
b)
Loses electrons
c)
Gains neutrons
d)
Gains electrons
62.

The nucleus of an atom consists of 8 protons and 6 neutrons. The total number of electrons present in a neutral atom of this element is

a)

2

b)

6

c)

8

d)

14

63.

Which of these choices is a physical property?

a)

solubility

b)

flammability

c)

ability to rust

d)

reaction with water

64.

Which of these best describes physical properties?

a)

Physical properties behave identically for all matter under the same conditions.

b)

Physical properties can be observed without changing the identity of a substance.

c)

Physical properties include flammability.

d)

Physical properties cause atoms and molecules to change structure when substances are mixed.

65.

Which of these is a chemical property of a sheet of paper?

a)

the paper can be burned

b)

the paper can be crumpled

c)

the paper does not attract a magnet

d)

the paper does not conduct electricity

66.

Which of these choices describes a chemical property?

a)

flexibility

b)

boiling point

c)

reactivity with water

d)

electrical conductivity

67.

Which process is an example of of a physical change?

a)

ice melting

b)

milk souring

c)

metal rusting

d)

wood burning

68.

Which of the following can be signs that a chemical change has occurred?

a)

color change

b)

formation of a gas (bubbles)

c)

energy change

d)

All of the above

69.

Each row on the periodic table represents:

a)

an energy level

b)

a sublevel

c)

an electron

d)

an orbital

70.
How many energy levels does Hafnium have?
a)
4
b)
72
c)
6
d)
cannot determine
71.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
72.

How many electrons can the 2nd shell hold?

a)

0

b)

up to 2

c)

up to 4

d)

up to 8

73.

Shiny (luster) and good conductors of electricity:

a)

Nonmetal

b)

Lightning

c)

Metal

d)

Semi-metal

74.
What atom matches this electron configuration?
1s22s22p63s2
a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
75.
What electron configuration matches an oxygen atom?
a)
1s22s22p63s2, 3p64s23d104p5
b)
1s22s22p4
c)
1s22s22p6
d)
1s22s22p63s23p64s23d1
76.

What do you start all electron configurations with?

a)

1s2

b)

1d10

c)

1f14

d)

1p6

77.

The 4 orbitals are

a)

s, p, d, f

b)

a, b, c, d

c)

2, 4, 6, 8

78.
Which element is pictured?
a)
neon
b)
fluorine
c)
magnesium
d)
argon
79.
Electron arrangement that uses arrows
a)
Electron configuration
b)
Shorthand configuration
c)
Lewis dot structure
d)
Orbital diagram
80.
Identify the Electron Configuration for Aluminum (Al)
a)
1s2 2s2 2p6 3s2 3p1
b)
1s2 2s2 2p6 3s2 3p3
c)
1s2 2s2 2p6 3s2 4p1
81.
This orbital diagram represents:  
a)
C
b)
B
c)
N
d)
O
82.
What atom matches this electron configuration?
1s22s22p63s2
a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
83.
What electron configuration matches an oxygen atom?
a)
1s22s22p63s2, 3p64s23d104p5
b)
1s22s22p4
c)
1s22s22p6
d)
1s22s22p63s23p64s23d1
84.
Which electron configuration belongs to Chlorine (Cl)?
a)
1s2 2s2 2p6 3s2 3p5
b)
1s2 2s2 2p6 3s2 3p6
c)
1s2 2s2 2p6 3s2 3p7
85.

What atom matches this electron configuration? 1s22s22p63s23p1

a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
86.

What is incorrect about this orbital diagram?

a)

Both arrows in the 2p box should be pointing up

b)

There are too many electrons in the 1s orbital

c)

In the 2p boxes, there should only be 1 electron in the first 2p box and one in the 2nd 2p box

d)

All the arrows should be pointing up

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