Mixtures and Compounds Flashcards
What is a molecule?
More than one atom bonded together
When is a molecule also a compound?
When the molecule is made from different types of atom (elements) bonded together.
What is an element?
A type of atom
When a metal reacts with a non-metal the resulting compound usually ends with..
-ide
Iron + Sulphur –>
Iron + Sulhpur –> Iron Sulphide
Magnesium + Oxygen –>
Magnesium + Oxygen –> Magnesium Oxide
Sulphur + Oxygen –>
Sulphur + Oxygen –> Sulphur Dioxide
Carbon + Oxygen –>
Carbon + Oxygen –> Carbon Dioxide
Is a balloon filled with Nitrogen and Helium a mixture or a compound?
Mixture because the Nitrogen and Helium are not chemically bonded together
How can we create a compound?
By adding heat
How do we know a chemical reaction is taking place?
Heat is released
Light is released
Colour change
Zinc + Sulphur –>
Zinc + Sulphur –> Zinc Sulphide
Is carbon dioxide a compound?
Yes because it is made from atoms of carbon and oxygen chemically bonded together
The reactants in a chemical reaction are…
what we start with
The products of a chemical reaction are…
what we are left with at the end
reactant + reactant —> _______
reactant + reactant –> product
_______ + ______ –> product
reactant + reactant –> product
What is meant by a reversible reaction?
When you can undo a reaction
What is meant by an irreversible reaction?
When you cannot undo a reaction
