Elements and Compounds

Front

What is a compound?

Back

A compound is a substance composed of at least two different elements that are chemically bonded together.

Front

Which of the following represents an element: H2O, H2, NaCl, CaCO3?

Back

H2 represents an element.

Front

Are both elements and compounds considered pure substances?

Back

Yes, both elements and compounds are pure substances.

Front

What does a compound consist of?

Back

A compound consists of two or more elements bound together.

Front

True or False: A compound is made up of only one type of atom.

Back

False, a compound is made up of two or more different types of atoms.

Front

What is the smallest unit of an element?

Back

The smallest unit of an element is an atom.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

Give an example of a compound.

Back

Water (H2O) is an example of a compound.

Front

What is a chemical bond?

Back

A chemical bond is the force that holds atoms together in a compound.

Front

What is the chemical formula for table salt?

Back

The chemical formula for table salt is NaCl.