Question 1

Which of the following could NOT be represented by a conceptual model?

Accepted Answer

A) the energy of a nucleus 
B) the floor plan of a house 
C) the weather 
D) the behavior of schoolchildren 
E) both A and B 
A) the energy of a nucleus 
B) the floor plan of a house 
C) the weather 
D) the behavior of schoolchildren 
E) both A and B

Question 2

If a neutral element has the following chemical notation, how many electrons does it have? fluorine-19

Accepted Answer

A) 9 
B) 10 
C) 11 
D) 19 
E) none of the above 
A) 9 
B) 10 
C) 11 
D) 19 
E) none of the above

Question 3

An atom absorbs or emits only particular frequencies of light. White light bends into a glass prism and separates into a rainbow of colors. In which of these two scenarios does the electromagnetic radiation behave as a wave? As a particle?

Accepted Answer

A) Absorption of light shows wave behavior while bending of light shows particle behavior. 
B) Absorption of light shows particle behavior while bending of light shows wave behavior. 
C) Both absorption and bending of light show particle behavior. 
D) Both absorption and bending of light show wave behavior. 
A) Absorption of light shows wave behavior while bending of light shows particle behavior. 
B) Absorption of light shows particle behavior while bending of light shows wave behavior. 
C) Both absorption and bending of light show particle behavior. 
D) Both absorption and bending of light show wave behavior.

Question 4

A one ounce Ping-Pong ball is pushed upwards by a fan so that the Ping-Pong ball hovers neither rising nor falling. What is the force of the wind on the Ping-Pong ball in units of ounces?

Accepted Answer

A) 1 ounce in an upward direction. 
B) 2 ounces in an upward direction. 
C) 1 ounce in an downward direction. 
D) 2 ounces in an downward direction. 
A) 1 ounce in an upward direction. 
B) 2 ounces in an upward direction. 
C) 1 ounce in an downward direction. 
D) 2 ounces in an downward direction.

Question 5

From which of the following atoms would removing an electron be the easiest?

Accepted Answer

A) Rb 
B) Sr 
C) Cd 
D) I 
E) Xe 
A) Rb 
B) Sr 
C) Cd 
D) I 
E) Xe

Question 6

Which of the above has the least energy?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) e 
A) a 
B) b 
C) c 
D) d 
E) e

Question 7

If an element has 9 protons and 10 neutrons and 9 electrons, which expression correctly identifies the element?

Accepted Answer

A)    F 
B)    F 
C)    K 
D)    K 
E)    K 
A)    F 
B)    F 
C)    K 
D)    K 
E)    K

Question 8

An element has two different isotopes: one that weighs 65 amu and another that weighs 67 amu. If the average atomic mass of all the isotopes is 66.5 amu, what can be said about the relative abundance of the isotopes?

Accepted Answer

A) The isotope with the mass of 67 is more abundant than the isotope with the mass of 65. 
B) The isotope with the mass of 65 is more abundant than the isotope with the mass of 67. 
C) The isotope with the mass of 66.5 is more abundant than the isotope with the mass of 67. 
D) The isotope with the mass of 66.5 is more abundant than the isotope with the mass of 65. 
E) All the isotopes have the same relative abundance. 
A) The isotope with the mass of 67 is more abundant than the isotope with the mass of 65. 
B) The isotope with the mass of 65 is more abundant than the isotope with the mass of 67. 
C) The isotope with the mass of 66.5 is more abundant than the isotope with the mass of 67. 
D) The isotope with the mass of 66.5 is more abundant than the isotope with the mass of 65. 
E) All the isotopes have the same relative abundance.

Question 9

The cathode ray consists of ________.

Accepted Answer

A) positively charged particles 
B) negatively charged particles 
C) electrically neutral particles 
D) massless particles 
A) positively charged particles 
B) negatively charged particles 
C) electrically neutral particles 
D) massless particles

Question 10

What does the following element description actually mean?   U

Accepted Answer

A) a uranium atom with 92 protons and 146 neutrons 
B) a uranium atom with 238 neutrons and 92 protons 
C) a uranium atom with 92 neutrons and 238 protons 
D) a uranium atom with 92 neutrons and 146 protons 
E) none of the above 
A) a uranium atom with 92 protons and 146 neutrons 
B) a uranium atom with 238 neutrons and 92 protons 
C) a uranium atom with 92 neutrons and 238 protons 
D) a uranium atom with 92 neutrons and 146 protons 
E) none of the above

Question 11

Which of the above has the most energy?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) e 
A) a 
B) b 
C) c 
D) d 
E) e

Question 12

In the following diagram, which of the following measurements would represent the distance the wave travels in 1 second if it has a frequency of 0.5 Hz?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) b and c 
A) a 
B) b 
C) c 
D) d 
E) b and c

Question 13

What is the main tenet of Planck's quantum hypothesis?

Accepted Answer

A) Energy comes in discrete packets of a certain minimum size. 
B) Energy is composed of subatomic particles called quanta. 
C) Energy is a continuum, but light is quantized. 
D) Energy can be converted into matter through nuclear quanta. 
E) Light is composed of waves that exist only at certain quantum fundamental frequencies. 
A) Energy comes in discrete packets of a certain minimum size. 
B) Energy is composed of subatomic particles called quanta. 
C) Energy is a continuum, but light is quantized. 
D) Energy can be converted into matter through nuclear quanta. 
E) Light is composed of waves that exist only at certain quantum fundamental frequencies.

Question 14

Which element has the atomic number 12?

Accepted Answer

A) Mg 
B) C 
C) B 
D) Na 
E) Be 
A) Mg 
B) C 
C) B 
D) Na 
E) Be

Question 15

If a neutral element has the following chemical notation, how many electrons does it have? carbon-13

Accepted Answer

A) 6 
B) 12 
C) 13 
D) 7 
E) none of the above 
A) 6 
B) 12 
C) 13 
D) 7 
E) none of the above

Question 16

The following statement describes which subatomic particle best? It is located outside of the nucleus.

Accepted Answer

A) an electron 
B) a proton 
C) a neutron 
D) A and B 
E) B and C 
A) an electron 
B) a proton 
C) a neutron 
D) A and B 
E) B and C

Question 17

If an element has 15 protons and 16 neutrons and 15 electrons, what is the atomic mass of the element?

Accepted Answer

A) 31 
B) 15 
C) 16 
D) 30 
E) none of the above 
A) 31 
B) 15 
C) 16 
D) 30 
E) none of the above

Question 18

The nucleus of an electrically neutral iron atom contains 26 protons. How many electrons does this iron atom have?

Accepted Answer

A) 52 
B) 26 
C) 24 
D) none 
A) 52 
B) 26 
C) 24 
D) none

Question 19

How does Rutherford's model of the atom explain why some of the alpha particles directed at the gold foil were deflected straight back toward the source?

Accepted Answer

A) Alpha particles sling shot around the atomic nucleus much like comets sling shot around the sun. 
B) Each atom has a center in which mass is very dense, but elastic. 
C) The gold nucleus is able to deflect alpha particles much like a mirror is able to reflect photons. 
D) The atomic nucleus is very small but dense and carries a positive electric charge. 
A) Alpha particles sling shot around the atomic nucleus much like comets sling shot around the sun. 
B) Each atom has a center in which mass is very dense, but elastic. 
C) The gold nucleus is able to deflect alpha particles much like a mirror is able to reflect photons. 
D) The atomic nucleus is very small but dense and carries a positive electric charge.

Question 20

Why did Rutherford propose a model for the atom with a very small nucleus containing the bulk of the mass and a positive charge?

Accepted Answer

A) because a beam of positively charged particles (alpha particles)were partially reflected by a thin gold foil 
B) because a beam of positively charged particles (alpha particles)were able to penetrate by a thin gold foil 
C) because a beam of negatively charged particles (beta particles)were partially reflected by a thin gold foil 
D) because a beam of negatively charged particles (beta particles)were able to penetrate a thin gold foil 
E) because a beam of positively charged particles (alpha particles)were completely reflected by a thin gold foil 
A) because a beam of positively charged particles (alpha particles)were partially reflected by a thin gold foil 
B) because a beam of positively charged particles (alpha particles)were able to penetrate by a thin gold foil 
C) because a beam of negatively charged particles (beta particles)were partially reflected by a thin gold foil 
D) because a beam of negatively charged particles (beta particles)were able to penetrate a thin gold foil 
E) because a beam of positively charged particles (alpha particles)were completely reflected by a thin gold foil

Which of the following could NOT be represented by a conceptual model?

If a neutral element has the following chemical notation, how many electrons does it have? fluorine-19

An atom absorbs or emits only particular frequencies of light. White light bends into a glass prism and separates into a rainbow of colors. In which of these two scenarios does the electromagnetic radiation behave as a wave? As a particle?

A one ounce Ping-Pong ball is pushed upwards by a fan so that the Ping-Pong ball hovers neither rising nor falling. What is the force of the wind on the Ping-Pong ball in units of ounces?

From which of the following atoms would removing an electron be the easiest?

Which of the above has the least energy?

If an element has 9 protons and 10 neutrons and 9 electrons, which expression correctly identifies the element?

An element has two different isotopes: one that weighs 65 amu and another that weighs 67 amu. If the average atomic mass of all the isotopes is 66.5 amu, what can be said about the relative abundance of the isotopes?

The cathode ray consists of ________.

What does the following element description actually mean? U

Which of the above has the most energy?

In the following diagram, which of the following measurements would represent the distance the wave travels in 1 second if it has a frequency of 0.5 Hz?

What is the main tenet of Planck's quantum hypothesis?

Which element has the atomic number 12?

If a neutral element has the following chemical notation, how many electrons does it have? carbon-13

The following statement describes which subatomic particle best? It is located outside of the nucleus.

If an element has 15 protons and 16 neutrons and 15 electrons, what is the atomic mass of the element?

The nucleus of an electrically neutral iron atom contains 26 protons. How many electrons does this iron atom have?

How does Rutherford's model of the atom explain why some of the alpha particles directed at the gold foil were deflected straight back toward the source?

Why did Rutherford propose a model for the atom with a very small nucleus containing the bulk of the mass and a positive charge?

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Exam 4: Subatomic Particles

Which of the following could NOT be represented by a conceptual model?

If a neutral element has the following chemical notation, how many electrons does it have? fluorine-19

An atom absorbs or emits only particular frequencies of light. White light bends into a glass prism and separates into a rainbow of colors. In which of these two scenarios does the electromagnetic radiation behave as a wave? As a particle?

A one ounce Ping-Pong ball is pushed upwards by a fan so that the Ping-Pong ball hovers neither rising nor falling. What is the force of the wind on the Ping-Pong ball in units of ounces?

From which of the following atoms would removing an electron be the easiest?

Which of the above has the least energy?

If an element has 9 protons and 10 neutrons and 9 electrons, which expression correctly identifies the element?

An element has two different isotopes: one that weighs 65 amu and another that weighs 67 amu. If the average atomic mass of all the isotopes is 66.5 amu, what can be said about the relative abundance of the isotopes?

The cathode ray consists of ________.

What does the following element description actually mean? U

Which of the above has the most energy?

In the following diagram, which of the following measurements would represent the distance the wave travels in 1 second if it has a frequency of 0.5 Hz?

What is the main tenet of Planck's quantum hypothesis?

Which element has the atomic number 12?

If a neutral element has the following chemical notation, how many electrons does it have? carbon-13

The following statement describes which subatomic particle best? It is located outside of the nucleus.

If an element has 15 protons and 16 neutrons and 15 electrons, what is the atomic mass of the element?

The nucleus of an electrically neutral iron atom contains 26 protons. How many electrons does this iron atom have?

How does Rutherford's model of the atom explain why some of the alpha particles directed at the gold foil were deflected straight back toward the source?

Why did Rutherford propose a model for the atom with a very small nucleus containing the bulk of the mass and a positive charge?

About Science

Particles of Matter

Elements of Chemistry

The Atomic Nucleus

How Atoms Bond

How Molecules Mix

How Water Behaves

How Chemicals React

Acids and Bases in Our Environment

Oxidations and Reductions Charge the World

Organic Compounds

Nutrients of Life

Medicinal Chemistry

Optimizing Food Production

Protection Water and Air Resources

Capturing Energy

Filters