metals Flashcards
what are some metal properties?
solid,dence,strong,malleable,shiny,insulater,high density
where are the metals on the pt?
on the left in the middle
where are the non metals on the pt?
on the right
uses of metals?
making cars&planes
wires
jewellery
cutlery
whats an alloy?
mixing 2 or more metals together
(stronger than normal metal)
metals with water equation?
metal+water->metal hydroxide+hydrogen
rusting equation?
metal+oxygen->metal oxide
rust=iron oxide
most reactive on reactivity series?
potassium
sodium
lithium
calcium
magnesium
top 5 least reactive on reactivity series?
plathium
gold
silver
copper
hydrogen
carbon on reactivity series
7th most reactive-will displace elements less reactive with its oxides
whats reduction?
the removal of oxygen
rusting conditions?
oxygen but water can quicken it
to prevent paint/varnish it
whats a metal ore?
a rock containing a metal in enough to be economically extracted
what are most metals found as?
oxides
compounds w the element oxygen
whats a compound?
2 or more elements chemically bonded
whats a mixture?
2 or more substances not chemically bonded
positives about quarrying?
building-things out of limestone
job opportunities
in future could be used for educational site
negatives about quarrying?
not a nice sight
dirty
loud
ruins habitat
trucks back and forth
how to minimise the negatives about quarrying?
make quarrys smaller
careful planning(planting small trees)
onced used then can be used as a tourist attraction & educational site
