Relative Atomic And Formula Masses. Flashcards
1
Q
What is relative atomic mass?
A
Relative atomic mass is the mean mass of an atom compared to a 1/12 the mass of a Carbon-12 atom.
2
Q
What does a chemical formula tell you?
A
It tells you how many atoms there are in a unit of substance.
3
Q
What is relative formula mass?
A
That is the mean mass of a unit of substance compared to a 1/12 of a Carbon-12 atom.
4
Q
How do you work out RFM?
A
Count how many atoms of each element there are.
Multiply that number by each element’s Ar (mass number on the Perioditic table).
Sum up all your totals.
5
Q
Do you multiply these indices while working out RFM?
(O4)3
A
Yes, you would multiply them.
6
Q
What is the symbol for RFM?
A
Mr.
7
Q
What is the symbol for relative atomic mass?
A
Ar.
