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13 November, 07:55

An element x has two naturally occurring isotopes: X-79 (abundance+50.69%, mass + 78.918amu) and X-81 (abundance+49.31% mass+80.917amu). Calculate the weighted atomic mass of X. also, identify the unknown element which exists as a reddish brown gas and is a liquid at room tempature

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  1. 13 November, 11:17
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    The answer would be B. Brimone. I had the same question before, but let me know if it is not right. Cause certain schools have the same questions but different answers for them.
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