Just 5 questions on this quiz  10 minutes target time
An IB Periodic Table is required.
Calculators are allowed as some of these questions contain more difficult calculations than those on IB multiple choice papers. 

1. Rubidium consists of two isotopes Rubidium85 and Rubidium87.
The relative atomic mass of Rubidium is 85.5 (to 1dp).
What is the percentage abundance of the Rubidium85 isotope?
 A. 50.0%
 B. 60.0%
 C. 75.0%
 D. 80.0%


2. A sample of an element consisted of 3 isotopes and produced the mass spectrum shown below.
What is the relative atomic mass of this element? 

 A. 28.1
 B. 28.3
 C. 28.9
 D. 30.4


3. A sample of an unknown element “Z” consists of 3 isotopes as shown below:
Isotope 
Percentage Abundance /% 
^{64}Z 
89.43 
^{65}Z 
7.15 
^{66}Z 
3.42 


What is the relative atomic mass of element “Z” to 2dp?
 A. 64.11
 B. 64.12
 C. 64.13
 D. 64.14


4. The relative atomic mass of Indium is 114.816. Indium consists of two isotopes, ^{113}In and ^{115}In. What is the percentage abundance of the isotope ^{113}In?
 A. 8.8%
 B. 9.0%
 C. 9.2%
 D. 9.4%


5. What is the relative atomic mass of zirconium from the information shown on the mass spectrum below?


 A. 90.9
 B. 91.3
 C. 91.7
 D. 92.1


