Unit 3 Metals Flashcards Preview

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Flashcards in Unit 3 Metals Deck (20)
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1
Q

How do metal elements form metallic bonds?

A

force of attraction between delocalised electrons and positive ions

2
Q

A metal’s reactivity is ??

A

how easily it will give away electrons

3
Q

Which elements react with water?

A

Up to sodium in the reactivity series (1st 4)

4
Q

Which elements react with acid?

A

Up to lead in the reactivity series (1st block)

5
Q

Which elements react with o2?

A

Up to silver in the reactivity series

6
Q

Metal + o2 = ??

A

Metal oxide

7
Q

Metal + H2O = ??

A

Metal hydroxide + hydrogen

8
Q

Metal + acid

A

Salt + hydrogen

9
Q

A battery is made up of ??

A

many electrochemical cells

10
Q

what is meant by a displacement reaction?

A

when a metal ion is displaced by a solution that is higher in the reactivity series

11
Q

why is an ion bridge important when making an electrochemical cell

A

allows ions to move + completes circuit

12
Q

what is the relationship between a metal’s reactivity and whether it will undergo oxidation or reduction

A

electrons flow from the most reactive to the least reactive so if it is more reactive it is oxidised, if it is less reactive it is reduced

13
Q

electrons flow from the ______ to the _______ metal

A

Most reactive, least reactive

14
Q

chemical test for hydrogen

A

burns with a “pop”

15
Q

what is the relationship between a metal’s reactivity and ease of extraction from its ore?

A

the more reactive the metal, the harder it is to extract

16
Q

which metals are found in the Earth’s crust uncombined?

A

(least reactive) Copper, Silver, Mercury, Gold

17
Q

which metals can be extracted by heat alone?

A

Mercury, silver + gold

18
Q

which metals can be extracted by reaction with carbon?

A

zinc - copper (not hydrogen!)

19
Q

which metals can be extracted only by electrolysis?

A

up to aluminium (1st 6)

20
Q

What is carbon acting as when it is used to extract a metal from its ore?

A

a reducing agent