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CHEMISTRY > P1(2) > Flashcards

P1(2) Flashcards

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1
Q

What are the horizontal rows in the periodic table?

A

Periods

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2
Q

What are the vertical columns in the periodic table?

A

Groups

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3
Q

What are isotopes ?

A

Atoms of the same elements with the same protons and electrons but different neutrons

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4
Q

What is the ph of acid and alkali?

A

Acid- below 7

Alkali-above 7

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5
Q

Give 3 points about the history of the periodic table

A

Democritus came up with the idea that everything is made up of atoms

JJ Thompson came up with the fact all atoms contained electrons

Rutherford helped discover that electrons are around the nucleus

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6
Q

What is the name of the chemical reaction between alkalis and acids ?

A

Neutralisation

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7
Q

What happens if the metal is more reactive ?

A

There will be a more vigorous reaction , a metal that is below hydrogen will not react with dilute acids

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8
Q

How do you separate different solids from a solution?

A

Use chromatography

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9
Q

Why are alkali metals stored in oil?

A

To stop them reacting with oxygen in the atmosphere , soft, float in water

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10
Q

What do group 1 metals react with to produce hydrogen gas ?

A

Water

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11
Q

What are covalent bonding ?

A

Covalent bonds are formed when atoms share pairs of electrons , form molecules

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12
Q

What is metallic bonding?

A

Metals that delocalise electrons

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13
Q

Equation for number of moles

A

Mass/ RAM or RFM

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14
Q

The more reactive the metal..

A

The more stable the compound

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15
Q

Why’s magnesium more reactive than copper?

A

Magnesium is more reactive than copper because it gives up electrons more easily

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16
Q

How do you extract and purify using carbon?

A

Use all metals below carbon to do so

17
Q

What colour does alkalis and acids make litmus paper go?

A

Alkali- blue

Acid- red

18
Q

What makes alkalis alkaline?

A

All alkaline solutions contain hydroxide ions, more OH- ions in a solution the more alkaline it will be

19
Q

What is the difference between exothermic and endothermic reactions ?

A

Endothermic - absorption of heat

Exothermic- release of heat

20
Q

Define redox reactions

A

Reaction in which there is a transfer of electrons from one chemical species to another

21
Q

Equation for acids + base and acids + metal

A

Both form salts

22
Q

Define electrolysis

A

chemical decomposition produced by passing an electric current through a liquid or solution

23
Q

What is OILRIG?

A

Oxidation is loss , Reduction is gain

24
Q

What is brine?

A

Salt water

25
Q

What is the solution used to conduct electricity?

A

Electrolyte

26
Q

Why does the solution of salts in water conduct electricity in electrolysis ?

A

Ions can move

CHEMISTRY (6 decks)

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