Atoms and Elements

Give three examples of an element:
Cobalt (Cu) Iron (Fe) Oxygen (O)
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If you combine atom of different elements what do they create?
Compounds
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How many elements does a compound contain?
A compound contains at least 2 different elements
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Give an example of a compound?
Combining sodium (Na) atoms and oxygen (O) atoms produces sodium oxide
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How do we represent a compound?
We can represent a compounds by combining the chemical symbols of the 2 elements e.g (Na and O) to create the chemical formula Na2O
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Chemical Reaction
s
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What are the key features of a chemical reaction?
Compounds are broken up or formed, at least 1 new substance is created, measurable energy change and no atoms are created or destroyed
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Chemical Equations
s
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What are the reactants?
The reactants (the chemicals that are reacting) are on the left-hand side
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What are the products?
The products (the chemicals that are forming) are on the right-hand side
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Why must symbol equations be balanced?
Because atoms aren't created or destroyed during chemical reactions
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What are the 2 types of chemical equations?
Symbol Equations and Word Equations
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When you combine different atoms what does it create?
Combining different atoms creates different compounds
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What does a compound contain?
At least 2 different elements
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What makes sodium oxide?
Combining sodium (Na) atoms and oxygen (O) atoms produces sodium oxide
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What is the word equation for sodium oxide?
Sodium + oxygen → sodium oxide
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What are all substances made out of?
Atoms
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How is a compound formed?
By a chemical reaction
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Define element:
A substance made from only one type of atom
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Define compound:
A substance made of two or more mixtures
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Other cards in this set

Card 2

Front

If you combine atom of different elements what do they create?

Back

Compounds

Card 3

Front

How many elements does a compound contain?

Back

Preview of the front of card 3

Card 4

Front

Give an example of a compound?

Back

Preview of the front of card 4

Card 5

Front

How do we represent a compound?

Back

Preview of the front of card 5
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