Atoms, Elements and Compounds

Select the correct definition for an atom.

• The smallest part of an element that can exist.

• A substance made of only one type of atom.

• A substance made of more than one type of atom that are chemically bonded together.

• A substance made of more than one type of atom that are not chemically bonded together.

Select the correct definition for an element.

• The smallest part of an element that can exist.

• A substance made of only one type of atom.

• A substance made of more than one type of atom that are chemically bonded together.

• A substance made of more than one type of atom that are not chemically bonded together.

Select the correct definition for a compound.

• The smallest part of an element that can exist.

• A substance made of only one type of atom.

• A substance made of more than one type of atom that are chemically bonded together.

• A substance made of more than one type of atom that are not chemically bonded together.

Elements can be found on the (a)   table.

Select the diagram that shows an atom.

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Select the diagram that shows an element.

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Select the diagram that shows a compound.

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Select the elements from this list.

• Carbon dioxide

• Hydrogen

• Nitrogen

• Hydrochloric acid

• Iron

Select the compounds from this list.

• Carbon dioxide

• Methane

• Nitrogen

• Hydrochloric acid

• Iron

Select the compounds from this list.

• O₂

• CO₂

• HCl

• CH₄

• Fe