chemical reactions

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What happens to atoms in chemical reactions?
They are rearranged to form new products with different physical and chemical properties from the reactants.
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Why are chemical reactions useful?
Chemical reactions are how new forms of matter are made.
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What are chemical reactions?
A chemical reaction is a change in which new compounds are made.
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What is the difference between chemical reactions and physical changes?
A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed
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What are reactants and products in a word equation?
Reactants area at the start and after the middle symbol is the products
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Word equations
sodium+chlorine -> sodium chloride
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Predicting products of combustion reactions?
zinc+oxygen-> zinc oxide
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Are oxiation reactions useful or not?
An iron oxidation reaction is not useful as it rusts the metal and it peels of. But any other metal is good in an oxidation reaction
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How to identify decomposition reactions from a word equations?
A decomposition reaction occurs when one reactant breaks down into two or more products. This can be represented by the general equation: AB → A + B
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How can I explain conservation of mass in chemical reactions?
In any chemical reactions, the total mass of reactants is equal to the total mass of products
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How can i calculate masses of reactants and products?
The reactants have to both add up to the product in the end./
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Characteristics of exothermic changes
An exothermic reaction is a chemical reaction that releases energy by light or heat.
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Characteristics of endothermic changes
An endothermic reaction takes in energy from things such as light or heat>
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Card 2

Front

Why are chemical reactions useful?

Back

Chemical reactions are how new forms of matter are made.

Card 3

Front

What are chemical reactions?

Back

Preview of the front of card 3

Card 4

Front

What is the difference between chemical reactions and physical changes?

Back

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Card 5

Front

What are reactants and products in a word equation?

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