Element vs Compound

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together. It can be broken down into simpler substances.

Front

What is the chemical formula for chalk?

Back

The chemical formula for chalk is CaCO3.

Front

How many elements are in the chemical formula CaCO3?

Back

There are three elements in the chemical formula CaCO3: Calcium (Ca), Carbon (C), and Oxygen (O).

Front

How many oxygen atoms are in the compound CaCO3?

Back

There are three oxygen atoms in the compound CaCO3.

Front

What is the chemical formula for oxygen gas?

Back

The chemical formula for oxygen gas is O2.

Front

Is O2 an element or a compound?

Back

O2 is an element because it consists of only one type of atom (oxygen).

Front

How many oxygen atoms are in one molecule of O2?

Back

There are two oxygen atoms in one molecule of O2.

Front

What is the difference between an element and a compound?

Back

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

Front

Can compounds be broken down into elements?

Back

Yes, compounds can be broken down into their constituent elements through chemical reactions.