C1.2.3 Compounds

What is a compound?

• Lots of elements in a mixture

• A substance made of two or more elements joined together

• It's where I keep my bike

Fill in the blank: A water molecule has one oxygen atom joined to two _______ atoms.

• Nitrogen

• Hydrogen

• Carbon

• Helium

What is the state of oxygen at room temperature?

• Solid

• Liquid

• Gas

Fill in the blank: The properties of a compound are different from the properties of the _______ it is made up of.

• Elements

• Molecules

• Compounds

• Mixtures

Sodium is a ____.

• Shiny metal

• Smelly gas

• Poisonous liquid

Chlorine is a ____.

• Shiny metal

• Smelly green gas

• Colorless liquid

Which element is a shiny metal that fizzes in water?

• Sodium

• Chlorine

• Oxygen

Which element is a smelly green poisonous gas?

• Sodium

• Chlorine

• Oxygen

What is the boiling point of oxygen?

• -183°C

• 0°C

• 100°C

The properties of a compound are ____ the properties of its elements.
For example salt is a compound, made of the elements sodium and chlorine

• the same as

• different to