Mark asked: ms pang, why is it we learn that nobel gas are grp 8 metals when they are grup 18? source: http://en.wikipedia.org/wiki/Noble_gases
my reply:
Indeed an interesting question!!!
But, let me make an amendment to your question...
Noble Gases are group X or group 0 non-metals.... not METALS.
Anyway, why wikipedia says group 18?
This is a new TERMINOLOGY....
Most scientist wanted to fit Transitions Metal into groups too... recall in our periodic table, transition metals are catagorise as a 'rectangular block' with no group......
So, after adding the transitions metal, we will have 18 groups hence noble gases become group 18!!!
Nonetheless, facts from websites cannot be trusted wholesomely..... unless it is some education (edu) or government (gov) websites..... such websites have more credibility.
ms pang :)
