Relative Mass Flashcards
1
Q
what is the mass number? is this an integer or does it not have to be?
A
mass number = total number of protons + total number of neutrons of a specific atom of a specific isotope- it has to be an integer
2
Q
definition of relative atomic mass, Ar
A
The relative atomic mass (Ar) is the average mass of an atom of an element relative to one twelfth of the mass of an atom of carbon-12 (taking into account the natural abundances of each naturally occurring isotope)
3
Q
does the Ar have to be an integer?
A
no
4
Q
definition of relative formula mass, Mr
A
average mass of a molecule of a substance, relative to one twelfth of the mass of a C-12 atom
5
Q
A
