Isotopes + Relative Atomic Mass (Ar) + Relative Formula Mass (Mr) + Percentage by Mass Flashcards
(4 cards)
1
Q
What is an isotope?
A
Atoms of the same element with the same number of protons but different number of neutrons
2
Q
How to calculate relative atomic mass
A
(mass of isotopes 1 x abundance of isotope 1) + (mass of isotope 2 x abundance of isotope 2) / total abundance
3
Q
How to calculate relative formula mass
A
add up the relative atomic masses of the atoms in the substance. little numbers must be taken into account (x2, x3, x4 ect)
4
Q
How to calculate percentage by mass
A
percentage by mass of an element = total relative atomic mass of the atoms of that element / relative formula mass of compound
