POSSIBLE POINTS: 23.33
An unknown element X has 3 stable isotopes. The isotopic masses (amu) and percent abundance of the isotopes are given in the table below.
Isotope
X₁
X₂
X3
a. X₁ has
Atomic Mass
b. X₂ has
39
c. X, has
40
3. How many protons and neutrons does each isotope have (3 pts)
41
Percent Abundance
1. Determine the average atomic mass of this element to 3 decimal places (3 pts)
I
2. Which element is this, most likely? (1 pt)
93.2581%
0.0117 %
6.7302 %
protons and
protons and
protons and
neutrons.
neutrons.
neutrons.
