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chemistry > metals > Flashcards

metals Flashcards

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1
Q

free electrons that are able to move across the metal structure

A

delocalised electrons

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2
Q

when a positive metal nuclei attract delocalised electrons

A

metallic bond (very strong)

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3
Q

do metals have high or low melting points

A

they have vert high melting and boiling points

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4
Q

why are metals good conductors

A

the delocalised electrons move easily through the metal

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5
Q

what is malleability

A

when the metal can be shaped or bent easily

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6
Q

what is an alloy

A

a mixture of two or more metals

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7
Q

what is an advatage of an alloy

A

they have improved properties than regular metals have such as bronze brass and steel

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8
Q

metal + acid —>

A

salt + hydrogen

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9
Q

what reaction releases heat

A

exothermic

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10
Q

a metal + acid is what kind of reaction

A

redox

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11
Q

in a metal + acid reaction is the metal reduced or oxidised

A

oxidised

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12
Q

hydrogen ions get reduced to what

A

hydrogen gas

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13
Q

any metal below (a) will not react with (a)

A

hydrogen

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14
Q

metal + oxygen—->

A

metal oxide

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15
Q

what metal reacts with air the fastest

A

potassium

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16
Q

what is effervescence

A

fizzing

17
Q

as you (descend or ascend) group 1 the metals become more reactive

A

descend

18
Q

the most unreactive metal is …

A

gold

19
Q

what happens during a displacemnt reaction

A

the more reactive metal will displace the less reactive metal from a solution of metal ions

20
Q

what indicates a displacemt reaction has occurred

A

a colour change

21
Q

what does oil stand for

A

oxidation
is
loss

22
Q

what does rig stand for

A

reduction
is
gain

23
Q

oxidation is

A

loss of electrons

24
Q

reduction is

A

gain of electrons

25
Q

page 10 in the data book show

A

reduction reactions

26
Q

in reduction reaction the electrons will appear on the

A

left of the arrow

27
Q

in oxidation reactions the elctrons will appear on the

A

right of the equation

28
Q

do redox equations contain electrons

A

no

29
Q

potassium
sodium
lithium
calcium

react with what

A

water

30
Q 
magnesium 
aluminium
zinc
iron
tin
lead

react with what

A

acid

31
Q

copper
mercury
silver

react with what

A

oxygen

32
Q

in electrosis the metals always get

A

reduced

33
Q

in a molten or aqueous solution the the ions are

A

free to move

34
Q

why is a dc current used in electrosis

A

it flows in one direction ( so the ions and atoms are only drawn to one either positive or negative carbon rod)

chemistry (8 decks)

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