Flashcards
year 9 metals
Flashcards do conjunto (69)
- 1Give 4 properties of metalshard
shiny
conductors of heat and electricity
reactive - 2give 3 properties of none metalssoft
insulator
easy to cut - 3what does sonorous meanmakes a ringing sound when hit
- 4what does melting point meantemp. at which metal melts
- 5what does malleable meancan hammer object into different shapes
- 6what does conduct heat meanobject which allows heat to pass through it easily
- 7what does electricity conductor meanallows electricity to pass easily
- 8what does ductile meaneasy to put into wires
- 9what does brittle meanbreaks very easily
- 10what does high density meanobject is very heavy for its size
- 11what is a good conductor of electricitymetals
- 12what is a good insulator of electricityplastic
- 13how to metals tarnishwhen they react with oxygen
- 14what is rust scientificallyiron oxide
- 15what is the equation for rustmetal + oxygen = metal oxide
- 16what is corrosionwhen metal peels off
- 17why is gold desirableit doesn't rust or corrode with water or air
- 18what does tarnishing meanto loose colour
- 19equation for metal and watermetal + water = metal hydroxide + hydrogen
- 20what are the three most reactive metals of all the alkaline metals?rubidium
frankium
cesium - 21what happened to lithium during the reactionfloated
turned purple - 22what is a group 1 metalalkaline metals
- 23what happened to sodium during the reactionwhizzed
produced hydrogen - 24what happens to potassium during the reactionself ignites
pops and fizzes
purple flame - 25write equation for lithium and waterlithium + water = lithium hydroxide + hydrogen
- 26eqaution for potassium and waterpotassium + water = potassium hydroxide + hydrogen
- 27what does aq meanaqueous // able to dissolve in water
- 28write equation for metal and acidmetal + acid = salt + hydrogen
- 29how is hydrochloric acid written down in a reactionchloride salt
- 30how is sulfuric acid written down in a reactionsulfate salts
- 31how is nitric acid written down in a reactionnitrate salt
- 32how do you test for hydrogenlight a splint and put it near gas
if it pops then gas is hydrogen - 33why do some metals give off more hydrogenthe more reactive a metal is, the more hydrogen it will give off
- 34how do metals corrodewhen they react with oxygen and metal
- 35how can paint prevent corrosionit acts as a protective barrier for the metal
- 36aluminium is _____________ but doesnt ______________.reactive but doesnt corrode
- 37what is galvansingwhen a layer of zinc is added to a metal
- 38what is sacrificial protectionwhen the zinc layer is reacted with first, then the under layer
- 39what does aluminium and carbon dioxide makealuminium carbonate
- 40why is galvansing a better option than paintbecause paint can peel off
- 41in the reactivity series, which two elements are gasescarbon and hydrogen
- 42what is a compound2 or more atoms joined together
- 43what is a displacement reactionwhen a more reactive metal replaces a less reactive metal
- 44say the abbreviation of the reactivity seriesplease
send
charlies
monkeys
and
zebras
in
lead
cages
securely
guarded - 45which gas reacts most with metalsoxygen
- 46which gas is given off when metals react with waterhydrogen
- 47which metal is capable of producing its own natural layeraluminium
- 48Iron is ______ reactive than ______more reactive than copper
- 49give one use of copperwires
- 50what is an alloycombination of two metals
done for a more stronger desirable metal - 51what does tensile strength meanif pressure is added, nothing will happen
- 52what is a moleculewhen atoms bond together
- 53give three examples of physical propertiescolour
smell
boiling point - 54give three examples of chemical propertiesdoes it burn
does it dissolve
does it explode - 55what is galvanizationcoating metals in zinc to prevent rusting
- 56what are noble gasesincredibly unreactive none metals
- 57how does a chemical reaction take place scientificallywhen atoms bump into each other, the electrons transfer from one atom to another.
they then make the atoms bond together - 58how are metals good conductorsthey have atoms that are compacted together so the heat and electricity can move around quickly.
- 59what does every substance need in able to react and whyneeds ENERGY to help break bonds
- 60what does a catalyst dolowers the energy being activated
- 61why can a displacement reaction happen?because there can be a stronger attraction between one part of the compound and substance than the other part of the compound
- 62what type of reaction is done to create a saltneutralization reaction
- 63what is a reactionwhen bonds in atoms break to rearrange into new substances
- 64order the post its starting with most reactivepotassium
sodium
calcium
magnesium
aluminium carbon
zinc
iron
tin
hydrogen
copper
silver
gold
platinum - 65how is steel madeby adding carbon to iron
- 661 use of aluminiumbodies of a plane
- 671 use of copperwater pipes
- 68what is oxidation and reductionoxidation - gain of oxygen in reaction
reduction - loss of oxygen in reaction - 69—
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- FlashCards sobre year 9 metals , criado por mansi M em 08-11-2017.
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- mansi M
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