Unit 3 Metals Flashcards Preview

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Flashcards in Unit 3 Metals Deck (20):
1

How do metal elements form metallic bonds?

force of attraction between delocalised electrons and positive ions

2

A metal's reactivity is ??

how easily it will give away electrons

3

Which elements react with water?

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

4

Which elements react with acid?

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

5

Which elements react with o2?

Up to silver in the reactivity series

6

Metal + o2 = ??

Metal oxide

7

Metal + H2O = ??

Metal hydroxide + hydrogen

8

Metal + acid

Salt + hydrogen

9

A battery is made up of ??

many electrochemical cells

10

what is meant by a displacement reaction?

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

11

why is an ion bridge important when making an electrochemical cell

allows ions to move + completes circuit

12

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

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

electrons flow from the ______ to the _______ metal

Most reactive, least reactive

14

chemical test for hydrogen

burns with a "pop"

15

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

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

16

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

(least reactive) Copper, Silver, Mercury, Gold

17

which metals can be extracted by heat alone?

Mercury, silver + gold

18

which metals can be extracted by reaction with carbon?

zinc - copper (not hydrogen!)

19

which metals can be extracted only by electrolysis?

up to aluminium (1st 6)

20

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

a reducing agent