Chapter 4, Problem 119E

The figure shown here is a representation of 50 atoms of a fictitious element with the symbol Nt and atomic number 120. Nt has three isotopes represented by the following colors: Nt-304 (red), Nt-305 (blue), and Nt-306 (gren).

a. Assuming that the figure is statistically representative of naturally occurring Nt, what is the percent natural abundance of each Nt isotope?

b. Use the listed masses of each isotope to calculate the atomic mass of Nt. Then draw a box for the element similar to the boxes for each element shown in the periodic table in the inside front cover of this book. Make sure your box includes the atomic number, symbol, and atomic mass. (Assume that percentages from part a are correct to four significant figures.)

$\text{Nt-304 303}\text{.956 amu}$

$\text{Nt-305 304}\text{.962 amu}$

$\text{Nt-306 305}\text{.978 amu}$