Two or more different elements bonded together.

Two or more elements not bonded together.

A chemical compound contains elements in ________ proportions.

The properties of compounds are _______ the properties of the elements they are made from.

What is the correct formula for magnesium sulfate?

A large 2 is used at the front of the compound if there is two of each atom.

Elements are placed in the order of left to right from the periodic table.

Subscript numbers are placed to the right of the corresponding element.

Subscript numbers are used when there is more than one atom.

You simplify the formulae to the simplest whole number ratio.

Which **two** are rules used for writing chemical formulae?

Name the compound that contains one sulfur atom and two oxygen atoms.

Key Stage 3

Compounds

A one or two letter representation of an element is known as its chemical {{}}.

Two or more atoms bonded together is known as a {{}}.

Match the elements to their chemical symbols.

Starting with lithium, put these elements in the correct order going down Group 1.