Keywords Flashcards

1
Q

Atom

A

does not dissolve in a liquid

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2
Q

Element

A

a substance made up of only one type of atom.

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3
Q

Chemical symbol:

A

The letter or letters used on the Periodic table to represent elements

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4
Q

Subatomic particles:

A

the small particles that make up an atom

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5
Q

Protons:

A

a Positively charged particle located in the nucleus of an atom

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6
Q

Neutrons

A

A neutrally charged particle located in the nucleus of the atom

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7
Q

Electrons

A

A negatively charged particle, located on shells that orbit the nucleus of the atom

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8
Q

Atomic number

A

A negatively charged particle, located on shells that orbit the nucleus of the atom

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9
Q

Mass number

A

the total number of protons and neutrons in an atom

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10
Q

Atomic structure

A

the idea proposed by Niels Bohr that electrons orbit the nucleus, in shells.

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11
Q

Electronic configuration

A

Describing the location of electrons in an atom

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12
Q

Istotapes

A

Atoms with the same number of protons but different numbers of neutrons

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13
Q

Periodic table

A

the modern periodic table groups elements to show patterns in their properties.

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14
Q

Groups

A

vertical columns of elements

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15
Q

Periods

A

horizontal rows of elements across the periodic table

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16
Q

Malleable

A

can be hammered into various shapes without cracking

17
Q

Ductile

A

metals can be drawn out to form a wire

18
Q

Conductor

A

alloys energy to flow through them e.g. copper

19
Q

Alloy

A

A mixture of metals e.g. copper and tin makes bronze.

20
Q

Compound

A

Substances made by joining together two or more elements

21
Q

Bond

A

strong forces that keep elements on compound together

22
Q

Mixture

A

consists of two or more substances mingled together but not chemically combined

23
Q

Molecule

A

Groups of two or more atoms bonded together

24
Q

Purity

A

Substances that contain only atoms or molecules of that substance

25
Q

Solution

A

When a solute dissolves in a solvent, the mixture is called a solution

26
Q

Solute

A

The substance that dissolves

27
Q

Solvent

A

the substance the solute dissolves into

28
Q

Insoluble

A

does not dissolve in a liquid

29
Q

Soluble

A

dissolves in a liquid

30
Q

Suspension

A

When a solute does not dissolve, it may settle on the bottom, or float through the liquid. This is called a suspension.

31
Q

Solubility

A

a measure of how much solute can dissolve in a fixed volume of solvent to make a saturated solution

32
Q

Solubility curve:

A

A graph of temperature versus solubility to show how solubility changes due to changing temperature

33
Q

Concentration

A

how much solute is dissolved in the solvent. It is measured in grams per litre.

34
Q

Dilute concentration:

A

a small amount of solute in a large quantity of solvent.

35
Q

Concentrated solution

A

A large quantity of solute in a small quantity of solvent

36
Q

Saturated solution

A

contains as much solute as possible at a given temperature

37
Q

Crystallisation

A

Crystals are formed by cooling a saturated solution. The formation of crystals is called crystallisation.