Answer
The average atomic mass of this element is 207.2 u.
The element is Lead, represented by the symbol: Pb.
Work Step by Step
1. Calculate the average atomic mass of the element:
$$( 0.0140 )( 203.973 \space u)+( 0.2410 )( 205.9745 \space u)+( 0.2210 )( 206.9759 \space u)+( 0.5240 )( 207.9766 \space u)=207.2 \space u$$
2. Use a periodic table to identify the element with average atomic mass equal to 207.2 u.
- It is Pb: Lead.
