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reactivity of metals

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evolution | 20:39 Tue 15th Feb 2005 | Science
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arrange the following metals in order of their decreasing reactivity:
calcium, gold, magnesium, sodium

give a reason for using gold as a filling for teeth (besides the fact that it looks soooo sexy .....)
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Avatar Image Kishimo

I think...(not totally sure but i did this in a science lesson recently)

most reactive is magnesium, then sodium, calcium then gold.

Gold is used as a filling for teeth because it is so unreactive.  It won't affect anything.

21:43 Tue 15th Feb 2005
Avatar Image NetSquirrel
Mostly correct - magnesium just goes between calcium and gold. http://www.bbc.co.uk/scotland/education/bitesize/standar d/img/chemistry/metals/reactivity_of_metals/reactivity_s eries.gif
21:53 Tue 15th Feb 2005
Avatar Image Kishimo

Oh yeah! (lol)

Shows how much I pay attention in science =D

16:08 Wed 16th Feb 2005
Avatar Image brachiopod
How many marks for this question?
22:50 Wed 16th Feb 2005

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