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Subjects > Chemistry - Revision mix > Flashcards

Chemistry - Revision mix Flashcards

1
Q

Isotope

A

Same atomic number, different mass number

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2
Q

Homologous series

A

Similar chemical properties

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3
Q

General formula for alkanes

A

CnH2n+2

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4
Q

General formula for alkenes

A

CnH2n

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5
Q

Condensation

A

When a gas changes into a liquied usually by cooling

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6
Q

Displacement reaction

A

A metal is formed from the solution of its ions by adding a metal higher in the electrochemical series

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7
Q

Reduction

A

A chemical change in which electrons are gained

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8
Q

Thermoplastic

A

Soften when heated

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9
Q

Thermosetting

A

Do not soften when heating

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10
Q

How to calculate the average rate

A

Change divided by time

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11
Q

How to find the number of neutrons

A

Protons (mass number) - Atomic number

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12
Q

Polar bonding

A

Uneven sharing of electrons

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13
Q

Ionic bonding

A

Metal and non metal ions - high melting and boiling

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14
Q

Covalent bonding

A

Non metals - share electrons to fill outer shells

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15
Q

Fuel

A

A hydrocarbon which is burned exothermically to produce energy

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16
Q

Diatomic elements

A 
Bromine 
Oxygen
Iodine 
Chlorine
Hydrogen
Fluorine
Nitrogen
17
Q

Test for Oxygen, Carbon dioxide and Hydrogen

A

Oxygen - Relights a glowing splint
Carbon dioxide - Turns limewater cloudy
Hydrogen - Burns with a pop

18
Q

Half life

A

The time in which the activity of radioisotope decays by half

19
Q

Testing for unsaturation aim

A

To test several liquid hydrocarbons for unsaturation using bromine solution

20
Q

Isomer

A

Same molecular formula, different structural formula

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