Elements and Compounds

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 kind of atom.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together. It has different properties than the individual elements.

Front

Give an example of an element.

Back

Helium (He) is an example of an element.

Front

What is the difference between an element and a compound?

Back

An element contains only one kind of atom, while a compound is made up of two or more different kinds of atoms.

Front

What does it mean for a substance to be pure?

Back

A pure substance has a uniform and definite composition, meaning it contains only one type of particle.

Front

Can compounds be broken down into simpler substances?

Back

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

Front

What is the chemical formula for water?

Back

The chemical formula for water is H₂O, which indicates it is a compound made of hydrogen and oxygen.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.

Front

What is the significance of the periodic table?

Back

The periodic table organizes all known elements based on their properties and atomic structure, helping to understand their relationships.

Front

What is an atom?

Back

An atom is the smallest unit of an element that retains the properties of that element.