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chemistry > metals > Flashcards

metals Flashcards

1
Q

what is metallic bonding?

A

electrostatic force of attraction between positively charged ions and delocalised electrons

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2
Q

why are metals good conductors of electricity and heat?

A

due to the presence of delocalised electrons

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3
Q

what happens when metals take part in chemical reactions?

A

lose electrons

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4
Q

oxidation

A

loss of electrons

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5
Q

reduction

A

gain of electrons

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6
Q

what is it called when an oxidation and reduction reaction occurs together?

A

redox

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7
Q

metal + oxygen

A

metal oxide

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8
Q

metal + water

A

metal hydroxide + hydrogen

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9
Q

how do you prevent moisture getting into contact with the surface of a highly reactive metal?

A

store it under oil

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10
Q

metal + acid

A

salt + hydrogen

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11
Q

what are examples of unreactive metals found in the earths crust?

A
  • gold
  • silver
  • mercury
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12
Q

what is an ore?

A

a naturally occurring compound of a metal

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13
Q

what is extraction?

A

the sepeation of a metal from other elements in the ore

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13
Q

why are mercury gold and silver found uncombined?

A

they are unreactive

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14
Q

why cant most metals be extracted by heat alone?

A

they are too strongly bonded

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15
Q

metal oxide and heat ->

A

metal + oxygen

16
Q

what is an oxide?

A

a compound of oxygen and another element

17
Q

metals above zinc are?

A

too reactive to be extracted by heating with carbon or carbon monoxide

18
Q

metal oxide + carbon and heat ->

A

metal + carbon dioxide

19
Q

industrial plant used to extract metals?

A

blast furnace

20
Q

how are the most reactive metals extracted from their ores?

A

electrolysis

21
Q

what metals react with oxygen?

A

all but silver mercury and gold

22
Q

where is nickel on the reactivity series?

A

between iron and tin

23
Q

where is hydrogen on the reactivity series?

A

between lead and copper

24
Q

where is carbon on the reactivity series?

A

between aluminium and zinc

25
Q

potassium pergamganate provides?

A

oxygen

26
Q

metals above hydrogen

A

can displace hydrogen ions (H+) from an acid

27
Q

metals below hydrogen

A

cannot displace hydrogen ions (H+) from an acid

chemistry (17 decks)

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