How can radioactive isotopes be used to date fossils?

By measuring the decay rate of isotopes.

By comparing the size of isotopes.

By observing the color change in isotopes.

By counting the number of isotopes.

In what ways does a compound differ from its component elements?

A compound has different properties than its elements.

A compound is the same as its elements.

Diagram of a carbon atom showing protons, neutrons, and electrons.

Diagram of a nitrogen atom showing protons, neutrons, and electrons.

Diagram of an oxygen atom showing protons, neutrons, and electrons.

Diagram of a hydrogen atom showing protons, neutrons, and electrons.

What role do neutrons play in the nucleus?

They stabilize the nucleus by reducing repulsion between protons

They determine the atom's chemical reactivity

They hold electrons in orbitals

A pure substance that consists of entirely one type of atom

A substance made of different types of atoms

A form of matter with no definite shape

What defines an isotope?

Forms of a single element with the same number of protons but different numbers of neutrons

Different elements with the same number of protons

Forms of a single element with the same number of neutrons

Different elements with different numbers of electrons

Which of the following remains the same in isotopes of an element?

Type of element and chemical reactivity

Number of neutrons and electrons

How is the periodic table organized?

By horizontal rows and vertical columns

What do elements in the same column of the periodic table share?

The same number of valence electrons

Unequal number of protons and electrons

Equal number of protons and electrons

To increase the overall stability of an atom's electron configuration.

To decrease the overall stability of an atom's electron configuration.

To reduce the number of electrons in an atom.

What is the Octet Rule?

The tendency of atoms to prefer to have eight electrons in the outermost shell.

The tendency of atoms to have six electrons in the outermost shell.

The tendency of atoms to have ten electrons in the outermost shell.

The tendency of atoms to have four electrons in the outermost shell.

How can you find the atomic number using the periodic table?

By looking at the top of each box

By looking at the bottom of each box

By looking at the middle of each box

By looking at the side of each box

How do you find the mass number of an element using the periodic table?

Take the average atomic mass under the symbol and round to the nearest whole number.

Use the atomic number and multiply by two.

Subtract the charge from the atomic number.

Add the atomic number and charge.

What is a characteristic of radioactive isotopes?

They have unstable nuclei and break down at a constant rate.

They are stable and do not change over time.

They are stable and break down at different rates.

They have stable nuclei and break down at a constant rate.

Do all radioactive isotopes break down at the same rate?

No, they break down at different rates.

Yes, they all break down at the same rate.

Yes, they break down at a constant rate.

No, they do not break down at all.

What is the definition of half-life?

The time it takes for half of the mass of a radioactive isotope to breakdown.

The time it takes for a radioactive isotope to completely decay.

The time it takes for a radioactive isotope to double in mass.

The time it takes for a radioactive isotope to become stable.

Why do ions form bonds?

To cancel out charges and achieve stability.

Introduction to (Bio)Chemistry Quiz

Authored by Daniel Conlin

Science

9th Grade

NGSS covered

Used 40+ times

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61 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the smallest unit of an element that retains the properties of that element?

Molecule

Compound

Atom

Ion

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which subatomic particle has a positive charge?

Electron

Neutron

Proton

Ion

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a substance made of two or more elements chemically combined in a fixed ratio?

Element

Compound

Ion

Molecule

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of bond involves the sharing of electron pairs between atoms?

Ionic Bond

Covalent Bond

Hydrogen Bond

van der Waals forces

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the term for a charged atom or molecule?

Isotope

Ion

Element

Compound

What are the three subatomic particles of an atom?

Protons, Neutrons, Electrons

Atoms, Molecules, Compounds

Ions, Isotopes, Elements

Solids, Liquids, Gases

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How are all of the isotopes of an element similar?

They have the same number of protons.

They have different chemical properties.

They have different numbers of electrons.

They have different atomic numbers.

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Introduction to (Bio)Chemistry Quiz

What is the smallest unit of an element that retains the properties of that element?

Which subatomic particle has a positive charge?

What is a substance made of two or more elements chemically combined in a fixed ratio?

What type of bond involves the sharing of electron pairs between atoms?

What is the term for a charged atom or molecule?

What are the three subatomic particles of an atom?

How are all of the isotopes of an element similar?

How can radioactive isotopes be used to date fossils?

In what ways does a compound differ from its component elements?

What are the main types of chemical bonds?

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