Amount of substance Flashcards
define relative atomic mass (Ar)
The relative atomic mass (Ar) of an element is the ratio of the average mass of the atoms of an element to the unified atomic mass unit
How is relative atomic mass determined?
The relative atomic mass is determined by using the average mass of the isotopes of a particular element.
Why does the Ar has no units?
The Ar has no units as it is a ratio and the units cancel each other out
Define relative isotopic mass.
The relative isotopic mass is the mass of a particular atom of an isotope compared to the value of the unified atomic mass unit.
define relative molecular mass (Mr).
The relative molecular mass (Mr) is the ratio of the weighted average mass of a molecule of a molecular compound to the unified atomic mass unit.
