Elements and Compounds Review 7.7

Front

What is an element?

Back

An element is a pure substance that contains only one kind of atom.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements bond together.

Front

Is H₂O an element or a compound?

Back

H₂O is a compound.

Front

What does the chemical formula HCl represent?

Back

HCl represents hydrochloric acid, which is a compound made of hydrogen and chlorine.

Front

How many atoms of hydrogen are in H₂O?

Back

There are 2 atoms of hydrogen in H₂O.

Front

What is the chemical symbol for magnesium?

Back

The chemical symbol for magnesium is Mg.

Front

Can elements be broken down into simpler substances?

Back

No, elements cannot be broken down into simpler substances by ordinary chemical means.

Front

What is the difference between an element and a compound?

Back

An element consists of only one type of atom, while a compound consists of two or more different types of atoms bonded together.

Front

What is the atomic symbol for oxygen?

Back

The atomic symbol for oxygen is O.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.