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Write 2 reasons responsible for late discovery of noble gasses.

Posted by Niharika Gore 5 years ago

CBSE > Class 10 > Science

3 answers

Shreya P Shreya P 5 years ago

The common thing with the noble gases is that they have full outer shells, and don't react with any elements. Noble gases were discovered later than other elements , simply because they were extremely unreactive . Being intert they were difficult to isolate via chemical reactions

2Thank You

Niharika Gore 5 years ago

Thanks

2Thank You

Gaurav Seth 5 years ago

The first person to actually isolate and note the presence of these noble gases was Henry Cavendish.

He removed all the nitrogen and oxygen chemically from a receptacle containing air. The nitrogen was oxidised to NO₂ by electric discharges and absorbed by a sodium hydroxide solution. Remaining oxygen was removed from the mixture by a special adsorber. 1/120 of the gas volume remained unreacted in the receptacle. As we know today, this must have been mainly argon (99.8%) and traces (0.2%) of other noble gases.

Two reasons for late discoveries of noble gases are:

1. They are present in extremely low concentrations in our environment.

2. They are very inert.

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Posted by Pandey Ji 6 months ago

CBSE > Class 10 > Science