metal reactivity keywords

Question 1

cation

Answer 1

ion with one or more positive charges

Question 2

displacement reaction

Answer 2

a reaction where a more reactive element takes the place of a less reactive element in a compound

Question 3

half equation

Answer 3

ionic equation showing transfer of electrons in oxidation and reduction

Question 4

oxidation

Answer 4

gain of oxygen/loss of electrons

Question 5

reactivity series

Answer 5

list of metals in order of reactivity with the most reactive at the top

Question 6

redox reaction

Answer 6

reaction where oxidation and reduction takes place

Question 7

reduction

Answer 7

lose oxygen/gain electrons

Question 8

spectator ions

Answer 8

ions that don’t change during a reaction

Question 9

bioleaching

Answer 9

using bacteria to extract metals from their ores

Question 10

electrolysis

Answer 10

process where electrical energy from a direct current supply decomposes electrolytes into constituent elements

Question 11

extraction

Answer 11

process where a metal is obtained from its ore

Question 12

leachate

Answer 12

solution produced when water/another solvent is passed through a mixture of substances and dissolves some of them

Question 13

native state

Answer 13

metal that occurs uncombined with any other element

Question 14

ore

Answer 14

rock/sediment containing high concentration of metal/a metal compound

Question 15

phytoextraction

Answer 15

extracting metals from their ores using plants

Question 16

corrosion

Answer 16

a reaction where metal reacts with water/air to form metal oxides/hydroxides

Question 17

rusting

Answer 17

reaction between iron, air and water that forms hydrated iron oxide (rust)

Question 18

tarnish

Answer 18

a dull film on a metal’s surface