Ch.3 (The Atom and Radioactivity) Practice Questions

Use the information in the illustration to answer the questions on the right

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Use this information to answer the questions on the right.

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In the isotope symbols shown above, what does the number on the left above the “C” represent?

atomic number

number of protons

number of neutrons

mass number

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Calcium has an atomic number of 20. What is the correct isotope symbol for calcium-44?

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For a given element, the average atomic mass is a "weighted" average of the atomic masses of the isotopes of that element. In calculating the average atomic mass, more "weight" is given to which isotopes?

the ones that are heavier

the ones that are more abundant in nature

the ones that have a larger atomic radius

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Lithium, Li, is 7.6% lithium-6 and 92.4% lithium-7. Determine the average atomic mass of lithium.

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Lithium has an atomic number of 3 and an average atomic mass of 6.941 amu. Predict the isotope you would find in the greatest abundance for lithium.

lithium-4

lithium-6

lithium-7

lithium-6.9

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If potassium-40 undergoes beta decay, the result is

argon-40

calcium-40

chlorine-36

scandium-44

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The diagram below shows the products of a nuclear reaction. What is the parent isotope?

tellurium-119

iodine-127

indium-119

cesium-127

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The equation below is an example of what kind of reaction?

alpha decay

beta decay

nuclear fission

nuclear fusion

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What makes a nuclear reaction different from a chemical reaction? Select all that apply.

In a nuclear reaction, atoms change from one element into another element

In a chemical reaction, no new elements are created.

Chemical reactions can release more energy than nuclear reactions

All nuclear reactions require very high temperatures to get started

All chemical reactions require very high temperatures to get started

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What element should replace the question mark in the following nuclear equation?

Fr

Rf

Rn

La

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Cm

Cf

Bk

Am

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Which of the following processes involve in a change of atomic identity.

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An isotope with atomic number 84 undergoes alpha decay followed by beta decay. What is the atomic number of the daughter isotope following these two decays?

82

84

81

83

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What is the radioactive particle that should be written after the + sign in the following equation?

alpha particle

beta particle

positron

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What process involves the combining of two atoms to form a bigger atom?

Fission

Fusion

Radioactive decay

Gamma ray emission

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What process involves splitting an atom into two or more smaller particles?

Fission

Fusion

Radioactive decay

Gamma ray emission

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The graph shows the amount of a radioactive isotope as a function of time. What is the half-life of the isotope?

100 years

150 years

200 years

500 years

You can watch the following video to review half-life calculations:

The half-life of carbon-14 is 5,715 years. Use the table below to answer the questions on the right

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A skull believed to belong to an early human being is found to have a carbon-14 content of 3.125% of that found in living organisms. How old is the skull?

5,715 years

11,430 years

22,860 years

28,575 years

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Ch.3 (The Atom and Radioactivity) Practice Questions

In the isotope symbols shown above, what does the number on the left above the “C” represent?

Calcium has an atomic number of 20. What is the correct isotope symbol for calcium-44?

For a given element, the average atomic mass is a "weighted" average of the atomic masses of the isotopes of that element. In calculating the average atomic mass, more "weight" is given to which isotopes?

Lithium, Li, is 7.6% lithium-6 and 92.4% lithium-7. Determine the average atomic mass of lithium.

Lithium has an atomic number of 3 and an average atomic mass of 6.941 amu. Predict the isotope you would find in the greatest abundance for lithium.

If potassium-40 undergoes beta decay, the result is

The diagram below shows the products of a nuclear reaction. What is the parent isotope?

The equation below is an example of what kind of reaction?

What makes a nuclear reaction different from a chemical reaction? Select all that apply.

What element should replace the question mark in the following nuclear equation?

Which of the following processes involve in a change of atomic identity.

An isotope with atomic number 84 undergoes alpha decay followed by beta decay. What is the atomic number of the daughter isotope following these two decays?

What is the radioactive particle that should be written after the + sign in the following equation?

What process involves the combining of two atoms to form a bigger atom?

What process involves splitting an atom into two or more smaller particles?

The graph shows the amount of a radioactive isotope as a function of time. What is the half-life of the isotope?

A skull believed to belong to an early human being is found to have a carbon-14 content of 3.125% of that found in living organisms. How old is the skull?

In the isotope symbols shown above, what does the number on the left above the “C” represent?

What is different about the three different isotopes shown?

Calcium has an atomic number of 20. What is the correct isotope symbol for calcium-44?

For a given element, the average atomic mass is a "weighted" average of the atomic masses of the isotopes of that element. In calculating the average atomic mass, more "weight" is given to which isotopes?

Lithium, Li, is 7.6% lithium-6 and 92.4% lithium-7. Determine the average atomic mass of lithium.

Lithium has an atomic number of 3 and an average atomic mass of 6.941 amu. Predict the isotope you would find in the greatest abundance for lithium.

If potassium-40 undergoes beta decay, the result is

The diagram below shows the products of a nuclear reaction. What is the parent isotope?

The equation below is an example of what kind of reaction?

What makes a nuclear reaction different from a chemical reaction? Select all that apply.

What element should replace the question mark in the following nuclear equation?

Which of the following processes involve in a change of atomic identity.

An isotope with atomic number 84 undergoes alpha decay followed by beta decay. What is the atomic number of the daughter isotope following these two decays?

What is the radioactive particle that should be written after the + sign in the following equation?

What process involves the combining of two atoms to form a bigger atom?

What process involves splitting an atom into two or more smaller particles?

The graph shows the amount of a radioactive isotope as a function of time. What is the half-life of the isotope?

A skull believed to belong to an early human being is found to have a carbon-14 content of 3.125% of that found in living organisms. How old is the skull?

How many half-lives does that correspond to?

What is different about the three different isotopes shown?

How many half-lives does that correspond to?