____ are the building blocks of all matter. Everything is made of atoms - even yourself. Atoms are the smallest particle of an ____, which are far too small to see. Even the most powerful ____ cannot visualise a single atom. If the earth’s population of 7 ____people were the size of an atom, they would take up less than 1mm of space. Elements - An element is a pure substance which is made from only one type of ____. Everything in the ____contains the atoms of one or more elements. The atoms in one element are all the same as each other, but they are different from the atoms of any other elements. There are 118 different ____. They are listed on the ____ table. Examples of elements include ____, hydrogen and carbon. Molecules - Molecules are made when two or more atoms chemically ____ together. Atoms from different elements can ____. When the atoms are from different elements, the molecule can also be called a compound.The atoms of some elements like helium do not form bonds. The atoms of elements such as hydrogen, nitrogen and oxygen join in pairs to make ____. Water is made of molecules. Each water molecule is made from ____ hydrogen atoms chemically bonded to one oxygen atom. This means that the chemical formula of water is ____.

Atoms, elements and compounds

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