Elements, Compounds, and Mixtures

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into any other substances. It is made from just one type of atom.

Front

What is a compound?

Back

A compound is a pure substance made from two or more elements that are chemically bonded in a fixed ratio.

Front

What is a mixture?

Back

A mixture is formed when two or more elements or compounds are present without being chemically bonded together.

Front

How can you separate a mixture of iron and sulfur?

Back

Iron can be separated from sulfur using a magnet because iron is a magnetic element.

Front

What happens when iron and sulfur are heated together?

Back

They react to form iron sulfide, a compound where the atoms are chemically bonded together.

Front

How many chemical elements are there?

Back

There are 118 chemical elements.

Front

Where are metals found on the periodic table?

Back

Metals are found on the left and in the middle of the periodic table.

Front

What is the periodic table?

Back

The periodic table is a table that lists all chemical elements and arranges them in a way that shows patterns and allows predictions about other elements.

Front

What is a molecule?

Back

A molecule is made up of two or more atoms that are strongly bonded together. It can be made of the same or different types of atoms.

Front

What is the difference between a compound and a mixture?

Back

In a compound, elements are chemically bonded in a fixed ratio, while in a mixture, elements or compounds are not chemically bonded and can be in any combination.