Neon
Radon
Xenon
Argon
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The selected answer is wrong:
according to the ababio chemistry text book page 251 under noble gases if u read down under the uses of noble gases it say radon is a radioactive.its radiation is used in medicine for treating some forms of cancer. y agron can some one pls tell me
REF: new school chemistry,page251 or general chemistry, page 289 under uses of noble gases

Argon plasma coagulation (APC) is a form of electrosurgery used to treat tumors of the lung and esophagus, among others. It is also a non- invasive way to alleviate symptoms of cancer, such as excessive bleeding.

hey look d ans is correct,REF. ababio page 251 USES OF NOBLE GAS---NO.5 RADON IS USED IN MEDICINE FOR TREATING SOME FORM OF CANCER.

Here is an explanation:
We have three litmus paper 1. Red litmus paper 2. Blue litmus paper and 3. Colourless paper. Therefore basic solution will turn red litmus paper to blue while acidic oxide will turn blue litmus paper to red to indicate the presence of the gas

Hahh radon is correct answer pls check advance chemistry cambridge university page 668




