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GCSE Chem > Definitions > Flashcards

Definitions Flashcards

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1
Q

Atomic Mass

A

The number of protons (in the nucleus) of an atom

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2
Q

Mass Number

A

The total number of protons and neutrons (in the nucleus) of an atom

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3
Q

Isotopes

A

Atoms with the same atomic number but with varying mass numbers.

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4
Q

Relative Atomic Mass (Ar)

A

How heavy an atom is when compared to the mass of an atom of Carbon-12

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5
Q

Relative Abundance (Higher)

A

How much of each isotope compared to the total amount of element in the world.

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6
Q

Element

A

Contains atoms with the same atomic number.

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7
Q

Compound

A

Contains two or more elements, that are chemically bonded together.

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8
Q

Mixture

A

Contains two or more different substance that are not chemically bonded

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9
Q

Ion

A

Charged particle

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10
Q

Mole

A

A unit for an amount of substance

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11
Q

Molar Mass

A

The mass of one mole of a substance measured in grams.

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12
Q

Solubility

A

The ability of a substance to dissolve in a solvent

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13
Q

Solution

A

Is a mixture of a solute and a solvent that does not separate out

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14
Q

Solute

A

A substance being dissolved in the solvent

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15
Q

Solvent

A

A substance that the solute is dissolved into

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16
Q

Saturated Solution

A

A solution where the maximum amount of solute has been dissolved into the solution

17
Q

Exothermic Reaction

A

An exothermic reaction is one which gives out energy to the surroundings, usually in the form of heat and shown with a rise in temperature of the surroundings.

18
Q

Endothermic Reaction

A

An endothermic reaction is one which takes energy from the surroundings, usually in the form of heat and usually shown by a fall in temperature of the surroundings.

19
Q

Enthalpy Change

A

The overall change in energy in a reaction is the Enthalpy change.

20
Q

Reversible Reaction

A

A reversible reaction is one where the products of the reaction can react with each other and convert back into the original reactant.

21
Q

Homologous Series

A

A group of compounds that can all be represented by the same general formula.

22
Q

Functional Group

A

A group of atoms that determine how a compound typically reacts.

GCSE Chem (19 decks)

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