Question 1

Visible light has a frequency range between 7 × 1014 Hz and 4 × 1014 Hz. Which frequency of light would have the most energy?

Accepted Answer

A)  7 × 1014 Hz 
B)  4 × 1014 Hz 
C)  Both have same energy. 
D)  Energy is related to wavelength only, not frequency. 
E)  none of the above 
A)  7 × 1014 Hz 
B)  4 × 1014 Hz 
C)  Both have same energy. 
D)  Energy is related to wavelength only, not frequency. 
E)  none of the above

Question 2

Which contributes more to an atom's mass: electrons or protons? Which contributes more to an atom's size?

Accepted Answer

A)  Protons contribute more to an atom's mass while electrons contribute more to its size. 
B)  Electrons contribute more to an atom's mass while protons contribute more to its size. 
C)  Protons contribute more to both the mass and size of an atom. 
D)  Electrons contribute more to both the mass and size of an atom. 
A)  Protons contribute more to an atom's mass while electrons contribute more to its size. 
B)  Electrons contribute more to an atom's mass while protons contribute more to its size. 
C)  Protons contribute more to both the mass and size of an atom. 
D)  Electrons contribute more to both the mass and size of an atom.

Question 3

Which of the following is not a form of electromagnetic radiation?

Accepted Answer

A)  sound waves 
B)  gamma rays 
C)  microwaves 
D)  infrared 
E)  X-rays 
A)  sound waves 
B)  gamma rays 
C)  microwaves 
D)  infrared 
E)  X-rays

Question 4

The following statement describes which subatomic particle best? It does not have an electrical charge.

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 5

If an element has 10 protons and 11 neutrons and 10 electrons, which expression correctly identifies the element?

Accepted Answer

A)  neon-21 
B)  neon-11 
C)  neon-31 
D)  sodium-11 
E)  sodium-20 
A)  neon-21 
B)  neon-11 
C)  neon-31 
D)  sodium-11 
E)  sodium-20

Question 6

Which of the following could best be represented by a physical model?

Accepted Answer

A)  a cell 
B)  an atom 
C)  rationality 
D)  ecosystem 
E)  both A and B 
A)  a cell 
B)  an atom 
C)  rationality 
D)  ecosystem 
E)  both A and B

Question 7

Which of the following atoms is the largest?

Accepted Answer

A)  Cs 
B)  Ba 
C)  Al 
D)  N 
E)  He 
A)  Cs 
B)  Ba 
C)  Al 
D)  N 
E)  He

Question 8

Which of the following statements is false?

Accepted Answer

A)  The atomic spectrum of helium is different from the atomic spectrum of neon. 
B)  Electromagnetic radiation often behaves like a wave. 
C)  An atomic spectrum is an element's fingerprint. 
D)  An atom emits electromagnetic radiation when an electron moves from a lower energy level to a higher energy level. 
E)  Light that is high in energy has a high frequency. 
A)  The atomic spectrum of helium is different from the atomic spectrum of neon. 
B)  Electromagnetic radiation often behaves like a wave. 
C)  An atomic spectrum is an element's fingerprint. 
D)  An atom emits electromagnetic radiation when an electron moves from a lower energy level to a higher energy level. 
E)  Light that is high in energy has a high frequency.

Question 9

How are frequency and wavelength related?

Accepted Answer

A)  The higher the frequency the lower the wavelength. 
B)  The larger the wavelength the higher the frequency. 
C)  The lower the frequency the lower the wavelength. 
D)  wavelength = frequency 
E)  none of the above 
A)  The higher the frequency the lower the wavelength. 
B)  The larger the wavelength the higher the frequency. 
C)  The lower the frequency the lower the wavelength. 
D)  wavelength = frequency 
E)  none of the above

Question 10

If a neutral element has the following chemical symbol, how many electrons does it have?   U

Accepted Answer

A)  92 
B)  82 
C)  235 
D)  143 
E)  none of the above 
A)  92 
B)  82 
C)  235 
D)  143 
E)  none of the above

Question 11

A beam of protons and a beam of neutrons of the same energy are both harmful to living tissue. The beam of neutrons, however, is less harmful. Why?

Accepted Answer

A)  Neutrons are much smaller and lighter than protons and would do less damage. 
B)  Neutrons travel at reduced speed compared to the speed at which protons travel. 
C)  Neutrons carry no electric charge and thus have a greater likelihood of passing through the tissue. 
D)  All of the above are reasons why neutrons are less harmful. 
A)  Neutrons are much smaller and lighter than protons and would do less damage. 
B)  Neutrons travel at reduced speed compared to the speed at which protons travel. 
C)  Neutrons carry no electric charge and thus have a greater likelihood of passing through the tissue. 
D)  All of the above are reasons why neutrons are less harmful.

Question 12

In the following diagram, which of the following is the measurement of one wavelength?

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

About how many times larger is a bacterium compared to an atom?

Accepted Answer

A)  The diameter of a bacterium is about 5000 times larger, making its overall volume roughly 100 billion times larger. 
B)  The diameter of a bacterium is about 100 times larger, making its overall volume roughly 500,000 times larger. 
C)  The diameter of a bacterium is about 10 times larger, making its overall volume roughly 50,000 times larger. 
D)  The overall size of a bacterium is approximately 6.02 ×   times larger than an atom. 
A)  The diameter of a bacterium is about 5000 times larger, making its overall volume roughly 100 billion times larger. 
B)  The diameter of a bacterium is about 100 times larger, making its overall volume roughly 500,000 times larger. 
C)  The diameter of a bacterium is about 10 times larger, making its overall volume roughly 50,000 times larger. 
D)  The overall size of a bacterium is approximately 6.02 ×   times larger than an atom.

Question 14

If you remove two protons and two neutrons from a gold atom (Au), what new element is formed?

Accepted Answer

A)  Ir2- 
B)  Au 
C)  Re 
D)  Au2- 
E)  Tl 
A)  Ir2- 
B)  Au 
C)  Re 
D)  Au2- 
E)  Tl

Question 15

Which of the following diagrams best represents the size of the atomic nucleus relative to the size of the atom?   A B C D

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
A)  A 
B)  B 
C)  C 
D)  D

Question 16

Which of the following is not a property of an electron?

Accepted Answer

A)  charge changes depending on mass 
B)  fundamental component of atoms 
C)  attracted towards positively charge electrical plates 
D)  weighs approximately 9.1 × 10-31 kg 
E)  has a negative charge 
A)  charge changes depending on mass 
B)  fundamental component of atoms 
C)  attracted towards positively charge electrical plates 
D)  weighs approximately 9.1 × 10-31 kg 
E)  has a negative charge

Question 17

If an element has 18 protons and 20 neutrons and 18 electrons, which expression correctly identifies the element?

Accepted Answer

A)  argon-38 
B)  argon-18 
C)  argon-20 
D)  calcium-38 
E)  calcium-20 
A)  argon-38 
B)  argon-18 
C)  argon-20 
D)  calcium-38 
E)  calcium-20

Question 18

What is the difference between radiation and electromagnetic radiation?

Accepted Answer

A)  Radiation is from decay of nuclei while electromagnetic radiation is any form of light. 
B)  Radiation is particles while electromagnetic radiation is a wave. 
C)  Radiation can be blocked by lead plates while electromagnetic radiation cannot be. 
D)  Radiation is waves while electromagnetic radiation is a particle. 
E)  Radiation is damaging to living tissue while electromagnetic radiation has no effect on living tissue. 
A)  Radiation is from decay of nuclei while electromagnetic radiation is any form of light. 
B)  Radiation is particles while electromagnetic radiation is a wave. 
C)  Radiation can be blocked by lead plates while electromagnetic radiation cannot be. 
D)  Radiation is waves while electromagnetic radiation is a particle. 
E)  Radiation is damaging to living tissue while electromagnetic radiation has no effect on living tissue.

Question 19

What was Niels Bohr's explanation for the observation of atomic spectra?

Accepted Answer

A)  Electrons could only move in discrete energy steps within an atom. 
B)  Electrons could not move in an atom. 
C)  Any photon could excite an electron. 
D)  Only certain photons with the correct energy could excite the quanta in the nucleus. 
E)  Nucleons could be excited by different electron energies. 
A)  Electrons could only move in discrete energy steps within an atom. 
B)  Electrons could not move in an atom. 
C)  Any photon could excite an electron. 
D)  Only certain photons with the correct energy could excite the quanta in the nucleus. 
E)  Nucleons could be excited by different electron energies.

Question 20

Oxygen, O, (number 8), sulfur, S, (number 16), and selenium, Se, (number 34) have such similar chemical properties because ________.

Accepted Answer

A)  their outermost shells contain the same number of electrons 
B)  because they are all located close to one another in the periodic table 
C)  they all have the same number of occupied shells 
D)  These elements can't have similar chemical properties because they are in different periods of the periodic table 
A)  their outermost shells contain the same number of electrons 
B)  because they are all located close to one another in the periodic table 
C)  they all have the same number of occupied shells 
D)  These elements can't have similar chemical properties because they are in different periods of the periodic table

Visible light has a frequency range between 7 × 10¹⁴ Hz and 4 × 10¹⁴ Hz. Which frequency of light would have the most energy?

Which contributes more to an atom's mass: electrons or protons? Which contributes more to an atom's size?

Which of the following is not a form of electromagnetic radiation?

The following statement describes which subatomic particle best? It does not have an electrical charge.

If an element has 10 protons and 11 neutrons and 10 electrons, which expression correctly identifies the element?

Which of the following could best be represented by a physical model?

Which of the following atoms is the largest?

Which of the following statements is false?

How are frequency and wavelength related?

If a neutral element has the following chemical symbol, how many electrons does it have? U

A beam of protons and a beam of neutrons of the same energy are both harmful to living tissue. The beam of neutrons, however, is less harmful. Why?

In the following diagram, which of the following is the measurement of one wavelength?

About how many times larger is a bacterium compared to an atom?

If you remove two protons and two neutrons from a gold atom (Au), what new element is formed?

Which of the following diagrams best represents the size of the atomic nucleus relative to the size of the atom? A B C D

Which of the following is not a property of an electron?

If an element has 18 protons and 20 neutrons and 18 electrons, which expression correctly identifies the element?

What is the difference between radiation and electromagnetic radiation?

What was Niels Bohr's explanation for the observation of atomic spectra?

Oxygen, O, (number 8), sulfur, S, (number 16), and selenium, Se, (number 34) have such similar chemical properties because ________.

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

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Exam 4: Subatomic Particles

Visible light has a frequency range between 7 × 1014 Hz and 4 × 1014 Hz. Which frequency of light would have the most energy?

Which contributes more to an atom's mass: electrons or protons? Which contributes more to an atom's size?

Which of the following is not a form of electromagnetic radiation?

The following statement describes which subatomic particle best? It does not have an electrical charge.

If an element has 10 protons and 11 neutrons and 10 electrons, which expression correctly identifies the element?

Which of the following could best be represented by a physical model?

Which of the following atoms is the largest?

Which of the following statements is false?

How are frequency and wavelength related?

If a neutral element has the following chemical symbol, how many electrons does it have? U

A beam of protons and a beam of neutrons of the same energy are both harmful to living tissue. The beam of neutrons, however, is less harmful. Why?

In the following diagram, which of the following is the measurement of one wavelength?

About how many times larger is a bacterium compared to an atom?

If you remove two protons and two neutrons from a gold atom (Au), what new element is formed?

Which of the following diagrams best represents the size of the atomic nucleus relative to the size of the atom? A B C D

Which of the following is not a property of an electron?

If an element has 18 protons and 20 neutrons and 18 electrons, which expression correctly identifies the element?

What is the difference between radiation and electromagnetic radiation?

What was Niels Bohr's explanation for the observation of atomic spectra?

Oxygen, O, (number 8), sulfur, S, (number 16), and selenium, Se, (number 34) have such similar chemical properties because ________.

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

Visible light has a frequency range between 7 × 10¹⁴ Hz and 4 × 10¹⁴ Hz. Which frequency of light would have the most energy?