The nature of substances and chemical reactions

What can't elements be?
Chemically be made simpler
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What does every atom of a particular element have?
The same number of protons (Atomic number)
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What is a compound?
An element made of two 2 or more substances chemically joined
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equation for finding the number of neutrons
Mass number - Atomic number
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What symbol is given to relative atomic mass?
Ar
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What does relative atomic mass tell you?
The number of protons and neutrons in the nucleus
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What is relative molecular mass (Mr)
The Ar of the elements in a compound added together
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What does filtration seperate?
Insoluble molecules from liquids
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what is the process of filtration?
The filter retains insoluble molecules and the liquid moves through the filter paper
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What does evaporation seperate?
Soluble particles from liquids
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What is the process of evaporation?
The mixture is heated and the liquid will evaporate, leaving the solid behind
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What does distillation seperate?
A mixture of liquids
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What is the process of distillation?
Different liquids have different boiling temperatures. One liquid will evaporate before the other meaning one liquid will be left behind
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What does chromatography seperate?
Substances depending on their mass and solubility
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What is a chemical reaction?
Atoms rearranging
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how do you know a chemical reaction has taken place?
colour change, Effervescence (fizzing/gas) or temperature change
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Give the acronym for empirical formula
Mass used in the sum - Atomic number of elements used - Divide the above - Ratio found by dividing both answers by the smallest answer
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Other cards in this set

Card 2

Front

What does every atom of a particular element have?

Back

The same number of protons (Atomic number)

Card 3

Front

What is a compound?

Back

Preview of the front of card 3

Card 4

Front

equation for finding the number of neutrons

Back

Preview of the front of card 4

Card 5

Front

What symbol is given to relative atomic mass?

Back

Preview of the front of card 5
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