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Chemistry 1 > Thursday > Flashcards

Thursday Flashcards

1
Q

Atoms

A

Number of protons are equal to the number of electrons

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2
Q

Isotopes

A

Isotopes are the same except for extra neutrons

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3
Q

Compounds

A

Atoms join together to make compounds

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4
Q

Mixtures

A

Mixtures are easily separated, not like compounds

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5
Q

Filtration

A

Filtration separates insoluble solids from liquids

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6
Q

How to separate soluble solids from solutions.1

A

Evaporation (heating the solution, crystals will form)

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7
Q

How to separate soluble solids from solutions.2

A

Crystallisation (only evaporate some of the solution, leave to cool, filter and leave in a warm place to dry)

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8
Q

Distillation

A

Simple distillation is used for separating out a liquid from a solution

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9
Q

Simple Distillation

A

Con -

You can only use it to separate things with very different boiling points

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10
Q

Distillation

A

Fractional distillation is used to separate a mixture of liquids

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11
Q

Endothermic and exothermic

A

Exothermic = heat given out

Endothermic = heat is taken in

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12
Q

Electrolysis

A

Electrolysis means ‘splitting up with electricity’

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13
Q

Electrolysis

A

Electrolysis of molten ionic solids forms elements

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14
Q

Electrolysis

A

Metals can be extracted from their ores using electrolysis

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15
Q

Redox

A

Oil Rig (oxidation is loss, reduction is gain)

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16
Q

Redox

A

Displacement reactions are redox reactions

17
Q

Bases

A

Metal oxides and metal hydroxides are bases

18
Q

Neutralising

A

Acids and bases neutralise each other

19
Q

Bases

A

A base is a substance with a pH greater than seven

20
Q

Acids

A

An acid is a substance that forms aqueous solutions with a pH of less than seven

21
Q

Concentration

A

Concentration is a measure of how crowded things are (can be measured in g/dm3)

22
Q

Moles

A

Number of moles = mass ➗ Mr

23
Q

Group 0 elements

A

All colourless gases

24
Q

Ionic compounds

A

Have a request lattice structure

25
Q

Covalent bonds

A

Sharing electrons

26
Q

Ionic bonding

A

Transfer of electrons

27
Q

Graphite

A

Contains sheets of hexagons

28
Q

Metallic bonding

A

Involves delocalised electrons

29
Q

Equation

A

Percentage mass of an element in a compound = Ar x number of atoms of that element ➗ Mr x 100

Chemistry 1 (1 decks)

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