Metals and Materials Flashcards
what is lustre
metals are shiny when freshly cut (lustrous)
what is malleable
metals can be bent or hammered into a new shape
What is ductile
metals can be streched into thin wire
what is Sonorous
metals make a sound when hit
what is conductors in metals
metals are good heat and electricity conductors
what is high melting point
metals can withstand high temperature without changing shape
what is strong in metals
metals can withstand forces, pressure or wear
what is hard in metals
metals are solid and firm and not easily broken
what is dense
metals are heavy for their size
what is an alloy
an alloy is a mixture of different pure metal element
what is corrosion
the more reactive of a metal is the more likely it will be to corrode
what is rust
term we use especially to describe oxidation of iron
what is reactivity series
it is a list of metals arranged in decreasing order of their reactivity.
What is the reaction of metals with oxygen
metals form a metal oxide when reacting with oxygen
what is the formula for metals and oxygen
metal + oxygen —> metal oxide
what is a polymer
(poly+many) (mono = one)
polymers are large molecules made of ‘ many’ repeating units. these smaller repeating units are called monomer.
what is polyethene
a plastic polymer made up of ethene
what is thermosetting plastics
- not affected by heat
- heat without melting
- difficult to recycle
what is thermoplastics
- become soft when heated
- remoulded into something new
- can be recycled
what is a hydrocarbon
a molecule made of only carbon and hydrogen atoms.
what is an organic compound
- all organic compounds are made up of only one or more carbon atoms
what are the compound names
- meth
- eth
- prop
- but
- pent
- hex
- hept
- oct
- non
- dec
what is an alkane
a series of hydrocarbons that are saturated (have a single bond)
