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SCIENCE Y9 REVISION > Chemistry > Flashcards

Chemistry Flashcards

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1
Q

Solid to liquid is…

A

Melting

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2
Q

Liquid to solid is…

A

Freezing

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3
Q

Liquid to gas is…

A

Boiling

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4
Q

Gas to solid is…

A

Condensing

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5
Q

Neutrons

A

Neutral (no charge) - 1 mass unit

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6
Q

Protons

A

+1 charge - 1 mass unit

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7
Q

Electron

A

-1 charge - no mass

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8
Q

Element

A

Made up of any 1 type of atom

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9
Q

Compound

A

More than 1 type of element, chemically combined together

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10
Q

Mixture

A

More than 1 type of element, not chemically joined

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11
Q

Molecule

A

A small groups of atoms, you can have a molecule of an element : O2 molecule of a compound - H2O

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12
Q

Souluble

A

Something that can be dissolved

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13
Q

Insoluble

A

Something that cannot dissolve

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14
Q

Distillation

A

A technique used to separate a solvent and a solution

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15
Q

Solute

A

A substance that dissolves in another substance

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16
Q

Solvent

A

A substance that dissolves a solute

17
Q

Solution

A

Mixture of the solvent and the solute

18
Q

Pure

A

1 element or 1 compound

19
Q

Chromatography

A

Used to separate mixtures of substances into their components

20
Q

Solvent front

A

The furthest the solvent ( the liquid that separates the inks ) can reach

21
Q

What happens during chromatography?

A

The solvent soaks up the paper and travels to the ink dots and the ink spreads out, separating the components of the substance

22
Q

Rf value

A

Distance travelled by substance

—

23
Q

35 - ???
Cl
17 - ???

A

35 - mass no. (Protons+neutrons)
Cl
17 - atomic no. ( electrons / protons )

24
Q

Isotopes

A

A variant of a particular chemical element which differ in neutron number

25
Q

35 37
Cl Cl
17 17

A

Both isotopes are chlorine because they both contain 17 protons / Electrons. However they are different isotopes because their mass numbers are different.

26
Q

Electrons

A

Shells around the nucleus. Max of 2 electrons on 1st shell and max of 8 electrons on other shells.

SCIENCE Y9 REVISION (3 decks)

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