The average atomic mass of the element is 207.21 amu and the identity of the element is Lead (Pb)
HOW TO CALCULATE THE AVERAGE ATOMIC MASS OF AN ELEMENT:
The average atomic mass of an element is calculated by summing up all the relative atomic masses of all the element's isotope.
According to this question, the isotopes of an element contains the following relative abundances and masses:
1. mass 203.973 amu - 1.40%
2. mass 205.9745 amu - 24.10%
3. mass 206.9759 amu - 22.10%
4. mass 207.9766 amu - 52.40%
Next, we convert each percentage abundance to decimal by dividing by 100.
1. mass 203.973 amu - 0.014
2. mass 205.9745 amu - 0.241
3. mass 206.9759 amu - 0.221
4. mass 207.9766 amu - 0.524
Next, we multiply each atomic mass with its corresponding decimal abundance and sum:
(203.973 × 0.014) + (205.9745 × 0.241) + (206.9759 × 0.221) + (207.9766 × 0.524)
= (2.856) + (49.639) + (45.742) + (108.979)
= 207.21
Hence, the average atomic mass of the element is 207.21 amu. The element with this average atomic mass (207.21 amu) is LEAD (Pb).
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