What is the defof a metal & can aluminium conduct electricity? If not, why is it classified as a metal?
From ancient times, metals have been identified by four qualities that they all have: CONDUCTIVITYThey can conduct electricityAll of themWe understand why this is these days - metal atoms together tend to share a very loose electron orbital which allows some electrons to move freely through space without being anchored to one particular atomIf you cool metals enough, they become superconductorsAnd most of the conduct heat well, tooMALLEABLE and DUCTILESomething is malleable if its shape can be deformed, particularly by hammering and the likeSomething is ductile if it can be drawn out into a wireTry these with a ceramic and it will just break (which was part of the problem with high-temperature superconductorsit was really hard to make wires out of them)! LUSTROUSOr, in other words, they're shiny and reflect lightAll metals are opaquesilver reflects on the order of 99.9% of the light that hits itWater and diamonds may have a kind of luster at certain angles, but it's nothing compared to that of a metalYou'll probably note that many of these qualities have a sort of 'well, of course metals are like THAT' character to themThat's what makes it a good definition! Aluminum is an interesting casePure metallic aluminum conducts electricity quite wellBut there's less of it around then you think there isMost metals oxidizegiven a bit of exposure to the elements and time iron rusts to a flaky red iron oxideAluminum, on the other hand, 'rusts' almost instantaneously (which is why metallic aluminum is pretty much NEVER found in nature)But aluminum oxide is very different from iron oxide - aluminum oxide is hard, greyish white, and non-porousSo when an aluminum can is made, the surface instantly rusts into a hard coating that protects the interior from rustingAluminum oxide will NOT conduct electricity, but metallic aluminum willSo that's the trick, reallyAluminum makes a dandy conductor, but you have to get to it first!
Brisk walking is great for burning body and tummy fatsExercising is often not enough to lose weightI am on low carb, low fat, high fibre, high proteinI have lost 31lbs/14kg and have been maintaining my 108lbs/49kg for more than a yearAll the details in my blog.
From ancient times, metals have been identified by four qualities that they all have: CONDUCTIVITYThey can conduct electricityAll of themWe understand why this is these days - metal atoms together tend to share a very loose electron orbital which allows some electrons to move freely through space without being anchored to one particular atomIf you cool metals enough, they become superconductorsAnd most of the conduct heat well, tooMALLEABLE and DUCTILESomething is malleable if its shape can be deformed, particularly by hammering and the likeSomething is ductile if it can be drawn out into a wireTry these with a ceramic and it will just break (which was part of the problem with high-temperature superconductorsit was really hard to make wires out of them)! LUSTROUSOr, in other words, they're shiny and reflect lightAll metals are opaquesilver reflects on the order of 99.9% of the light that hits itWater and diamonds may have a kind of luster at certain angles, but it's nothing compared to that of a metalYou'll probably note that many of these qualities have a sort of 'well, of course metals are like THAT' character to themThat's what makes it a good definition! Aluminum is an interesting casePure metallic aluminum conducts electricity quite wellBut there's less of it around then you think there isMost metals oxidizegiven a bit of exposure to the elements and time iron rusts to a flaky red iron oxideAluminum, on the other hand, 'rusts' almost instantaneously (which is why metallic aluminum is pretty much NEVER found in nature)But aluminum oxide is very different from iron oxide - aluminum oxide is hard, greyish white, and non-porousSo when an aluminum can is made, the surface instantly rusts into a hard coating that protects the interior from rustingAluminum oxide will NOT conduct electricity, but metallic aluminum willSo that's the trick, reallyAluminum makes a dandy conductor, but you have to get to it first!
if you really want to lose your weight don't worry.exercise daily with some hard workouts,drink fresh jucies.if you want more details view the website
Brisk walking is great for burning body and tummy fatsExercising is often not enough to lose weightI am on low carb, low fat, high fibre, high proteinI have lost 31lbs/14kg and have been maintaining my 108lbs/49kg for more than a yearAll the details in my blog.
if you really want to lose your weight don't worry.exercise daily with some hard workouts,drink fresh jucies.if you want more details view the website
