Which of the following best describes a compound?

A substance made of atoms of two or more elements chemically combined

Why do elements in the same period (row) of the periodic table have different properties?

They have different numbers of protons

They have different numbers of electron shells

They have the same number of neutrons

They have the same chemical properties

Which statement best explains why there are a finite number of elements?

Only certain numbers of protons can exist stably in a nucleus

Atoms can only be made in laboratories

Elements are created by mixing compounds

There are infinite combinations of atoms

A student observes that sodium (Na) and potassium (K) are in the same group on the periodic table. What can the student infer about their properties?

They have similar chemical properties

They have the same number of neutrons

Which of the following is true about all atoms of the same element?

They have the same number of protons

They have the same number of neutrons

They have the same number of electrons

Given the atomic theory, explain why atoms are considered the building blocks of matter.

Because all matter is made up of atoms, which combine in various ways to form all substances

Because they are the largest units of matter

Because atoms cannot combine with each other

Because atoms are only found in living things

If you know the number of protons in an atom, what else can you determine about the atom?

Its atomic number and its identity as a specific element

Explain why compounds have different properties from the elements that make them up.

Because atoms combine chemically and form new substances with new properties

Because the atoms in compounds are physically blended

Because compounds are always gases

A student claims that all nonliving things are made of compounds. Is this claim correct? Why or why not?

No, because some nonliving things are made of elements, not compounds

Yes, because all matter is made of compounds

Yes, because only living things are made of elements

No, because nonliving things are not made of atoms

How does the arrangement of electrons in an atom affect its chemical behavior?

The arrangement determines how the atom interacts and bonds with other atoms

It does not affect chemical behavior

Only the number of protons matters

Only the number of neutrons matters

A student is given a list of substances: water ( $$H_2O$$ ), oxygen ( $$O_2$$ ), and carbon dioxide ( $$CO_2$$ ). Which are compounds and which are elements? Explain your reasoning.

Water and carbon dioxide are compounds; oxygen is an element because it contains only one type of atom

All are elements because they are made of atoms

Oxygen and carbon dioxide are compounds; water is an element

All are compounds because they have more than one atom

Why are elements grouped together in the periodic table?

Because they have similar properties

Because they have the same number of protons

Because they have the same atomic mass

A student notices that chlorine (Cl) and fluorine (F) are in the same group on the periodic table. What prediction can the student make about their chemical behavior?

They will have similar chemical behaviors

They will have very different chemical behaviors

They will have the same atomic mass

They will not react with other elements

Explain how the atomic theory supports the idea that both living and nonliving things are made of the same basic building blocks.

Because all matter, living or nonliving, is made of atoms that combine in various ways to form different substances

Because only living things are made of atoms

Because nonliving things are not made of atoms

Because only nonliving things are made of compounds

Atoms and the Periodic Table Quiz

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Atoms and the Periodic Table Quiz

30 questions

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

Which subatomic particle has a negative charge?

Where are protons and neutrons located in an atom?

What is the name of the table that organizes elements based on their properties?

Which subatomic particle is found outside the nucleus?

How many different elements are there in the periodic table?

What do atoms of different elements combine to form?

Which subatomic particle has no charge?

What is the charge of a proton?

What is the center of an atom called?

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