Metals and Materials

Question 1

what is lustre

Answer 1

metals are shiny when freshly cut (lustrous)

Question 2

what is malleable

Answer 2

metals can be bent or hammered into a new shape

Question 2

What is ductile

Answer 2

metals can be streched into thin wire

Question 3

what is Sonorous

Answer 3

metals make a sound when hit

Question 4

what is conductors in metals

Answer 4

metals are good heat and electricity conductors

Question 5

what is high melting point

Answer 5

metals can withstand high temperature without changing shape

Question 6

what is strong in metals

Answer 6

metals can withstand forces, pressure or wear

Question 7

what is hard in metals

Answer 7

metals are solid and firm and not easily broken

Question 8

what is dense

Answer 8

metals are heavy for their size

Question 9

what is an alloy

Answer 9

an alloy is a mixture of different pure metal element

Question 10

what is corrosion

Answer 10

the more reactive of a metal is the more likely it will be to corrode

Question 11

what is rust

Answer 11

term we use especially to describe oxidation of iron

Question 12

what is reactivity series

Answer 12

it is a list of metals arranged in decreasing order of their reactivity.

Question 13

What is the reaction of metals with oxygen

Answer 13

metals form a metal oxide when reacting with oxygen

Question 14

what is the formula for metals and oxygen

Answer 14

metal + oxygen —> metal oxide

Question 15

what is a polymer

Answer 15

(poly+many) (mono = one)
polymers are large molecules made of ‘ many’ repeating units. these smaller repeating units are called monomer.

Question 16

what is polyethene

Answer 16

a plastic polymer made up of ethene

Question 17

what is thermosetting plastics

Answer 17

• not affected by heat
• heat without melting
• difficult to recycle

Question 18

what is thermoplastics

Answer 18

• become soft when heated
• remoulded into something new
• can be recycled

Question 19

what is a hydrocarbon

Answer 19

a molecule made of only carbon and hydrogen atoms.

Question 20

what is an organic compound

Answer 20

• all organic compounds are made up of only one or more carbon atoms

Question 21

what are the compound names

Answer 21

• meth
• eth
• prop
• but
• pent
• hex
• hept
• oct
• non
• dec

Question 22

what is an alkane

Answer 22

a series of hydrocarbons that are saturated (have a single bond)