Chemistry Key Word Definitions (E)

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What is an electrolyte?
A liquid, containing free-moving ions, that is broken down by electricity in the process of electrolysis.
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What is an electron?
A tiny particle with a negative charge. Electrons orbit the nucleus in atoms or ions.
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What is an electronic structure?
A set of numbers to show the arrangement of electrons in their shells (or energy levels), for example, the electronic structure of a potassium atom is 2, 8, 8, 1.
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What is an element?
A substance made up of only one type of atom. An element cannot be broken down chemically into any simpler substance.
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What is an empirical formula?
The simplest ratio of elements in a compound.
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What is an emulsifier?
A substance which helps keep miscible liquids (for example, oil and water) mixed so that they do not separate out into layers.
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What is an emulsion?
A mixture of liquids that do not dissolve in each other.
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What is the end point?
The point in a titration where the reaction is complete and titration should stop.
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Endothermic is...?
A reaction that takes in energy from the surroundings.
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What is equilibrium?
The point in a reversible reaction in which the forward and backward rates or reaction are the same. Therefore, the amounts of substances present in the reacting mixture remain constant.
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What is ethene?
An alkene with the formula C_(2)H_(4).
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Exothermic is...?
A reaction that gives out energy to the surroundings.
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Card 2

Front

What is an electron?

Back

A tiny particle with a negative charge. Electrons orbit the nucleus in atoms or ions.

Card 3

Front

What is an electronic structure?

Back

Preview of the front of card 3

Card 4

Front

What is an element?

Back

Preview of the front of card 4

Card 5

Front

What is an empirical formula?

Back

Preview of the front of card 5
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