8,700 B.C.
No clue who discovered it.
acidic in naturenature
Generally, Oxides of non-metals are acidic in nature. When non-metals are reacted with water it forms an acidic solution. The common oxides of Sulphur, Selenium, and Bromine are strongly acidic.
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I don't know like probably 198km/h
Answer:
what's the qstn first ?????
Halogens I believe because it included fluorine which is the most reactive nonmetal
