Question #043b0

1 Answer
Andrea B. · Nam D. · Meave60
Feb 11, 2018

See below.

Explanation:

The mass of #""^12"C"# that is the isotope with #6# protons, #6# neutrons, and #6# electrons is fixed for definition and is exactly #12.00 \ "amu"#.

The atomic weight of each element is the average of the atomic weights of every isotope of that element. For #"C"#, there exists three isotopes #""^12"C"#, #""^13"C"#, and #""^14"C"# with a different amount of neutrons #(6, 7, 8)# but since the first is the more abundant the atomic weight is slightly over #12 \ "amu"#.

Related questions
Impact of this question
219 views around the world
You can reuse this answer
Creative Commons License