Chapter 3.1 - Metals Flashcards Preview

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Flashcards in Chapter 3.1 - Metals Deck (22)
0

Metallic bonds occur

Between the atoms of metal elements

1

The outer electrons are delocalised and this produces an electrostatic force of attraction between

The positive metal ions and the negative delocalised electrons, this acts as a glue holding the atoms together.

2

The 'sea' of delocalised electrons are the reason for metals being

Good conductors of electricity.

3

As one electron moves into the metal from the power supply, another

Will jump off the metal. Metals remain unchanged throughout the process.

4

Only the metals above Hydrogen in the reactivity series will react with an

Acid because all acids contain H+ ions.

5

Only the most reactive metals react strongly with

Oxygen

7

Most metals don't react except the very reactive metals such as caesium and potassium with

Water

8

The flow of electrons in a cell is produced because of the difference in the

reactivity of the two metals

9

Electrons will flow from the

most reactive metal (oxidation) to the least reactive metal (reduction)

10

An ion bridge

completes the circuit

11

A fuel cell converts

chemical energy from a fuel into electrical energy

12

Rechargeable batteries reverse the direction of the

electrical flow, this revers the chemical reaction making it ready to use again.

13

In displacement reactions a reactive metal

displaces a metal that is less reactive from solution

14

When substances lose electrons it is known as

oxidation

15

when substances gain electrons it is known as

reduction

16

Mg ---> Mg2+ + 2e is a

oxidation reaction

17

Cu2+ + 2e- ---> Cu is a

Reduction reaction

18

Redox reaction is when both

oxidation and reduction take place

19

Less reactive metals such as gold are found as pure metal because they are

very unreactive

20

The more reactive a metal is, the harder it is to

extract

21

A reducing agent is a substance

that can donate electrons

22

Most very reactive metals require

electrolysis to be removed