Question

Average atomic mass of element X is 35.5u . Find the MASS NUMBER of the elements if their percentages are 75% and 25% respectively.​

Answer 1

Explanation:

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Answer 2

• The element is Chlorine.
• It's atomic number is 17.
• The mass number of Chlorine is 35.5
• It consists of 75% of Chlorine with mass 35 and 25% of Chlorine with mass 37.

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