Practice: Which of the following choices has the greatest atomic mass?
The atomic mass of an element can be found on the Periodic Table.
Determining Atomic Mass
Concept #1: The atomic masses of elements can be found on the Periodic Table.
Example #1: Which of the following represents an element from the first column with the greatest atomic mass?
On the Periodic Table, the atomic mass is represented by the number with decimal places.
Concept #2: Most Abundant Isotope
Example #2: Oxygen consists of three isotopes, 168O, 178O, and 188O. If the atomic mass for oxygen on the periodic table is 15.999 amu, which isotope is the most abundant?
Practice: Vanadium consists of two isotopes, 5023V and 5123V. If the atomic mass for copper on the periodic table is 50.942 amu, are there more atoms of 5023V and 5123V in a sample of vanadium?
Practice: Potassium consists of three isotopes, 3919K, 4019K, and 4119K. Based on its atomic mass, which isotope of potassium is the most abundant?
