alloys,polymers,plastics and ceramics Flashcards
why are alloys made?
alloys are made because some metals are not specifically needed for something so chemists will mix together a metal and other elements to form alloys
how are alloys made?
alloys are made by mixing a metal with either another metal or a non-metal
what deos mixing elements do to make alloys?
it changes the properties of the alloy so that it has some of the properties of metals like hardness,strength and resistance to corrosion
what is steel?
steel is iron with a small amount of carbon added
what can steel be used for?
it can be used for bridges and scaffolding
what is stainless steell?
it is steel with nickel and chromium added (helps to stop the rusting)
why is tungsten added to steelo?
to make it tougher and more hardwearing
what is gold mixed with to make harder and stronger alloys?
silver and copper
how is solder made?
it is made by mixing tin and lead
does solder melt at a lower temp than tin and lead?
yes
what is one of the most imprtant properties of copper?
it blends with other metals to form a whole rangw of very useful alloys
how is brass msde?
it is made by mixing copper with zinc
what is brass used for?
machine parts,door furniture,pots pans and ornaments
it brass stronger than pure zinc or copper?
yes
what is bronze?
it is copper alloyed to tin ti make it harder
what is bronze used for?
it is used for statues medals
what are the two elements in cupronickel
copper and nickel
what is a use of plastic?
bottles and bowls
what is a polymer?
it is a long chain of molecules made up of similar units called monomer
how are monomer units joined together?
using polymersiation
how is the nameo of a new polymer made?
by adding poly to the start
what does plastic release when buyrned?
carbon monoxide
whatg do som,e other plastics produce when burned?
hydrogen chlordie and hydrogen cynaide
what are ceramics made of?
they are made up oif clay sand and felapsr
