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CHEM H Ch 4 Semester Exam Review

Total questions: 100

Worksheet time: 50mins

Name
Class
Date
1.

The smell of the ocean is caused by atoms.

a)

True

b)

False

2.

The atom is the fundamental building block of everything we hear, feel, see, and experience.

a)

True

b)

False

3.

An atom is the smallest identifiable unit of a compound.

a)

True

b)

False

4.

John Dalton was the first person recorded as thinking that matter was ultimately composed of atoms.

a)

True

b)

False

5.

John Dalton formalized an atomic theory that gained acceptance in the early 19th century.

a)

True

b)

False

6.

You can continually divide matter into smaller and smaller pieces without ever coming to an end.

a)

True

b)

False

7.

The plum pudding model proposed that negatively charged electrons were held in a sphere of positive charge.

a)

True

b)

False

8.

All of the positive charge of an atom is concentrated in the nucleus.

a)

True

b)

False

9.

J.J. Thomson discovered the existence of protons.

a)

True

b)

False

10.

Ernest Rutherford proved the existence of electrons.

a)

True

b)

False

11.

The gold foil experiment proved that large regions of the atoms consisted of empty space.

a)

True

b)

False

12.

The nucleus of an atom is a very small, dense region that contains over 99.9% of the atomic mass.

a)

True

b)

False

13.

Protons and electrons each have a mass of 1 amu.

a)

True

b)

False

14.

A positive charge attracts negative charges and repels other positive charges.

a)

True

b)

False

15.

The mass of a proton is exactly the same as the mass of a neutron.

a)

True

b)

False

16.

The charges on electrons and neutrons cancel each other to give neutral atoms.

a)

True

b)

False

17.

Protons and neutrons have similar masses and similar electrical charges.

a)

True

b)

False

18.

An atom containing 8 protons, 9 neutrons, and 8 electrons would be considered charge-neutral.

a)

True

b)

False

19.

The number of protons in an atom's nucleus defines the element.

a)

True

b)

False

20.

If two atoms each contain different numbers of protons, the atoms must be from different elements.

a)

True

b)

False

21.

All elemental symbols are comprised of a two-letter abbreviation.

a)

True

b)

False

22.

The elemental symbol for manganese is Mg.

a)

True

b)

False

23.

All carbon atoms have exactly 6 protons.

a)

True

b)

False

24.

The atomic number of nitrogen is 14.01.

a)

True

b)

False

25.

Mendeleev is best remembered for his pioneering work on determining atomic structure.

a)

True

b)

False

26.

Mendeleev's early periodic table predicted the existence of elements that had yet to be discovered.

a)

True

b)

False

27.

In the modern periodic table, elements are listed in order of increasing atomic number rather than increasing relative mass.

a)

True

b)

False

28.

Metals are located on the left side of the periodic table.

a)

True

b)

False

29.

The elements within a group on the periodic table tend to have similar properties.

a)

True

b)

False

30.

Group 2A elements are called alkali metals.

a)

True

b)

False

31.

Aluminum is one of the most commonly used metalloids.

a)

True

b)

False

32.

An element is discovered that is a solid, has one valence electron, and readily forms a 1+ ion. This element would be correctly classified as a nonmetal.

a)

True

b)

False

33.

Main-group elements tend to form ions that have the same number of total electrons as the nearest halogen.

a)

True

b)

False

34.

A cation forms when an atom gains an electron.

a)

True

b)

False

35.

Halogens form anions with a 1- charge.

a)

True

b)

False

36.

Isotopes are atoms of the same element that have a different numbers of neutrons.

a)

True

b)

False

37.

The atomic mass of individual atoms of an element may vary.

a)

True

b)

False

38.

The relative amount of each different isotope in a naturally occurring sample of an element is always the same.

a)

True

b)

False

39.

All elements have three or more naturally occurring isotopes.

a)

True

b)

False

40.

The atomic mass of a single carbon atom is equal to exactly 12.011 amu.

a)

True

b)

False

41.

Which of the following statements about atoms is FALSE?

a)

Atoms compose all matter.

b)

Atoms are responsible for the sensation of smell.

c)

Atoms are the basic building block of nature.

d)

An atom is the smallest identifiable unit of an element.

e)

All of the above statements are true.

42.

Which statement below accurately describes the contributions of Democritus?

a)

A) ancient Greek philosopher who proposed that matter was not continuous

b)

B) created the modern periodic table

c)

C) proposed the modern Atomic Theory

d)

D) discovered the existence of electrons

e)

E) none of the above

43.

Which statement below accurately describes the contributions of Dalton?

a)

A) developed the periodic table

b)

B) discovered the neutron

c)

C) proposed the modern Atomic Theory

d)

D) identified the electron

44.

Which scientist is described by the following statement: ancient Greek philosopher who proposed that matter was continuous?

a)

Democritus

b)

Mendeleev

c)

Dalton

d)

Thomson

e)

none of the above

45.

Which scientist is described by the following statement: created the modern periodic table?

a)

Democritus

b)

Mendeleev

c)

Dalton

d)

Thomson

e)

none of the above

46.

Which scientist is described by the following statement: proposed the modern Atomic Theory?

a)

Democritus

b)

Mendeleev

c)

Dalton

d)

Thomson

e)

none of the above

47.

Which scientist is described by the following statement: discovered the existence of electrons?

a)

Democritus

b)

Mendeleev

c)

Dalton

d)

Thomson

e)

none of the above

48.

Which scientist is described by the following statement? Father of the Periodic Table

a)

Democritus

b)

Mendeleev

c)

Dalton

d)

Thomson

e)

none of the above

49.

Which of the following is NOT part of Dalton's Atomic Theory?

a)

Each element is composed of tiny indestructible particles called atoms.

b)

All atoms of a given element have the same mass and other properties that distinguish them from the atoms of other elements.

c)

Atoms combine in simple, whole-number ratios to form compounds.

d)

Most of the atom's mass and all of its positive charge is contained in a small core called the nucleus.

e)

All of the above are part of the atomic theory.

50.

Which statement below accurately describes the contributions of Thomson?

a)

ancient Greek philosopher who proposed that matter was continuous

b)

created the modern periodic table

c)

proposed the modern Atomic Theory

d)

discovered the existence of electrons

e)

none of the above

51.

Which of the statements about the discovery of electrons is FALSE?

a)

Because atoms are neutral, the existence of a negatively charged particle implied there must be a positively charged component of an atom.

b)

Thomson proposed that electrons were small particles held within a positively charged sphere.

c)

Rutherford proved the plum-pudding model correct.

d)

The negatively charged electron is located outside the nucleus.

e)

All of the above statements are true.

52.

Which statement below is NOT consistent with the nuclear theory of the atom as proposed by Rutherford?

a)

Most of the atom's mass and all of its positive charge is contained in a small core called the nucleus.

b)

Electrical charge is a fundamental property of protons and electrons in which like charges repel and opposite charges attract.

c)

Most of the volume of the atom is empty space occupied by tiny, negatively charged electrons.

d)

There are as many electrons outside the nucleus as there are protons inside the nucleus in a neutral atom.

e)

All of the above statements are consistent.

53.

Which statement reflects the results of Rutherford's gold foil experiments?

a)

Almost all of the alpha particles were deflected back in the direction from which they came.

b)

Almost all of the alpha particles sputtered gold atoms off of the surface of the foil.

c)

Almost all of the alpha particles were deflected while passing through the foil.

d)

Almost all of the alpha particles passed directly through the foil.

e)

none of the above

54.

An atom containing 7 protons, 8 neutrons, and 7 electrons:

a)

is charge-neutral.

b)

is an ion.

c)

is an oxygen atom.

d)

cannot exist.

e)

none of the above

55.

The atomic mass unit is defined as:

a)

the mass of the hydrogen atom containing only one proton.

b)

the mass of electrons found in a carbon atom containing six protons and neutrons.

c)

1/12 the mass of a carbon atom containing six protons and six neutrons.

d)

1/14 the mass of a nitrogen atom containing 7 protons and 7 neutrons.

e)

none of the above

56.

Which of the following statements about the nature of electrical charge is FALSE?

a)

Electrical charge is a fundamental property of protons and electrons.

b)

Positive and negative electrical charges attract each other.

c)

Positive-positive or negative-negative charges repel each other.

d)

Positive and negative charges cancel each other so that a proton and electron, when paired, are charge neutral.

e)

All of the above statements are true.

57.

Which of the following subatomic particles has a mass of 1.67×10−27kg1.67 \times 10^{-27} kg ?

a)

electrons only

b)

protons only

c)

neutrons only

d)

protons and neutrons

e)

none of the above

58.

Which of the following elements has an atomic number of 4?

a)

H

b)

C

c)

He

d)

Be

e)

none of the above

59.

Which of the following elements has only 12 protons?

a)

C

b)

Zn

c)

Mg

d)

O

e)

none of the above

60.

What is the atomic symbol for silver?

a)

S

b)

Ag

c)

Au

d)

Si

e)

none of the above

61.

What is the atomic symbol for tin?

a)

Sn

b)

Ti

c)

Tn

d)

Si

e)

none of the above

62.

What is the correct chemical symbol for mercury?

a)

Hm

b)

Hy

c)

Me

d)

My

e)

none of the above

63.

Which of the following is NOT a correct name, symbol combination?

a)

beryllium, Be

b)

magnesium, Mg

c)

iron, I

d)

manganese, Mn

e)

silicon, Si

64.

Which of the following is NOT a correct name, symbol combination?

a)

beryllium, Be

b)

phosphorus, P

c)

iron, Fe

d)

manganese, Mg

e)

silicon, Si

65.

Which of the following is NOT a correct name, symbol combination?

a)

calcium, Ca

b)

gold, Au

c)

manganese, Mn

d)

chromium, Cr

e)

potassium, P

66.

The names of the elements whose symbols are Si, P, Mn, and S are respectively:

a)

silicon, potassium, magnesium, and sulfur.

b)

silver, phosphorus, magnesium, and sulfur.

c)

silicon, phosphorus, manganese, and sulfur.

d)

silicon, phosphorus, magnesium, and sulfur.

e)

silicon, potassium, magnesium, and sodium.

67.

Which one of the following is a main-group element?

a)

Ce

b)

Co

c)

Cu

d)

Cs

e)

none of the above

68.

Metals are located where on the periodic table?

a)

left side

b)

right side

c)

middle

d)

zig-zag diagonal line

e)

none of the above

69.

Nonmetals are located where on the periodic table?

a)

left side

b)

right side

c)

middle

d)

zig-zag diagonal line

e)

none of the above

70.

Metalloids are located where on the periodic table?

a)

left side

b)

right side

c)

middle

d)

zig-zag diagonal line

e)

none of the above

71.

Group 1A elements are also called:

a)

noble gases.

b)

halogens.

c)

alkaline earth metals.

d)

alkali metals.

e)

none of the above

72.

Group 7A elements are also called:

a)

noble gases.

b)

halogens.

c)

alkaline earth metals.

d)

alkali metals.

e)

none of the above

73.

Group 8A elements are also called:

a)

noble gases.

b)

halogens.

c)

alkaline earth metals.

d)

alkali metals.

e)

none of the above

74.

Group 2A elements are also called:

a)

noble gases.

b)

halogens.

c)

alkaline earth metals.

d)

alkali metals.

e)

none of the above

75.

Mg is a member of which family?

a)

noble gases

b)

halogens

c)

alkaline earth metals

d)

alkali metals

e)

none of the above

76.

Xe is a member of which family?

a)

noble gases

b)

halogens

c)

alkaline earth metals

d)

alkali metals

e)

none of the above

77.

Examine the elements listed below and identify the one element that is from a different periodic table group than the others.

a)

Si

b)

Sn

c)

Ti

d)

Ge

e)

All of these are from the same group.

78.

Cr is a member of which family?

a)

noble gases

b)

halogens

c)

alkaline earth metals

d)

alkali metals

e)

none of the above

79.

All of the following statements about different elements are true EXCEPT:

a)

Barium is an alkaline earth metal.

b)

Manganese is a transition metal.

c)

Sulfur is considered a metalloid.

d)

Krypton is one of the noble gases.

e)

Iodine is a halogen.

80.

Identify the element that is a nonmetal, a gas, and has an elemental symbol that starts with the letter "A."

a)

Ac

b)

Ar

c)

Au

d)

Al

e)

none of the above

81.

Ions are formed when atoms:

a)

gain or lose protons.

b)

gain or lose electrons.

c)

gain or lose neutrons.

d)

Each of these results in ion formation.

e)

None of these results in ion formation.

82.

When an atom loses an electron, the resulting particle is called:

a)

a proton.

b)

an anion.

c)

a cation.

d)

an isotope.

e)

none of the above

83.

When an atom gains an electron, the resulting particle is called:

a)

a proton.

b)

an anion.

c)

a cation.

d)

an isotope.

e)

none of the above

84.

Which of the following statements about ions is INCORRECT?

a)

Cations are positive ions and anions are negative ions.

b)

Cations are formed when an atom loses electrons.

c)

Anions are formed when an atom gains electrons.

d)

Cations always have the same number of protons as electrons.

e)

All statements are correct.

85.

What is the correct formula for a potassium ion with 18 electrons?

a)

P+

b)

K+

c)

K-

d)

P-

e)

none of the above

86.

How many electrons are in Br-?

a)

4

b)

7

c)

34

d)

36

e)

none of the above

87.

How many protons and electrons are present in O2-?

a)

8 protons and 8 electrons

b)

10 protons and 8 electrons

c)

8 protons and 10 electrons

d)

16 protons and 8 electrons

e)

none of the above

88.

What is the charge on the barium ion?

a)

1-

b)

2-

c)

1+

d)

2+

e)

none of the above

89.

What is the charge on the ion formed by selenium?

a)

1-

b)

2-

c)

1+

d)

2+

e)

none of the above

90.

There is very little of the element astatine (symbol = At) on earth. If astatine formed an ion, it would most likely have the charge of:

a)

1+

b)

1-

c)

2+

d)

2-

e)

none of the above

91.

What is the charge on the ion formed by aluminum?

a)

5-

b)

3-

c)

13+

d)

3+

e)

none of the above

92.

What is the charge on the cesium ion?

a)

1-

b)

2-

c)

1+

d)

2+

e)

none of the above

93.

How many electrons would be in a -2 charged anion of sulfur?

a)

2

b)

16

c)

18

d)

36

e)

none of the above

94.

Isotopes are:

a)

atoms of the same element that have different number of neutrons.

b)

atoms of the same element that have different number of protons.

c)

atoms of the same element that have different number of electrons.

d)

atoms of the same element that have the same number of neutrons.

e)

none of the above

95.

The number of protons in the nucleus of an atom:

a)

is called the atomic number.

b)

is given the symbol "Z.","identifies the atom as a particular element.

c)

is the same for all isotopes of an element.

d)

all of the above

96.

The nucleus of an atom consists mainly of:

a)

neutrons and electrons.

b)

protons and electrons.

c)

protons and neutrons.

d)

protons, neutrons, and electrons.

e)

none of the above

97.

How many neutrons are present in Ne-22?

a)

12

b)

10

c)

22

d)

32

e)

none of the above

98.

How many neutrons are present in C-14?

a)

14

b)

12

c)

6

d)

8

e)

none of the above

99.

What is the mass number of the hydrogen isotope that contains 2 neutrons?

a)

1

b)

2

c)

3

d)

4

e)

none of the above

100.

How many protons and neutrons are in Cl-37?

a)

20 protons, 17 neutrons

b)

17 protons, 37 neutrons

c)

17 protons, 20 neutrons

d)

37 protons, 17 neutrons

e)

none of the above

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