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× Mail . Lisa Marie Curtis-... X e Chegg Study | Guided Sol × + € i www.v vebassign.net/web/Student/AssignmentResponses/submit?dep=13759695#Q2 C Search You have completed this question and have received credit. 2. +-1 points ZumChem83.CW.01 My Notes Question: 1 An element consists of the following isotopes Isotope Percent Mass 19.78 10.013 amu 80.22 11.019 amu 2 The average atomic mass is 10.98 Vamu calculated to two decimal places The name of the element is Submit Enter an answer, then click Submit. Show Hints OF 1 + 80 +:08 PM 5/10/2016

Explanation / Answer

To calculate the average atomic weight, each exact atomic weight is multiplied by its percent abundance . Then, add the results together .

average atomic wt. = exact atomic weight xpercent abundance =10.013 x0.1978 + 11.019 x0.8022=1.9806+8.8394=10.82amu

the element is Boron.

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