FC3 moles Flashcards
What is meant by the term relative atomic mass?
Weighted mean mass of an atom of an element compared to the mass of 1/12th of carbon 12.
Explain why the relative atomic masses of most elements are not whole numbers.
Weighted mean masses often get decimals because it’s an average.
Why aren’t relative atomic mass values are given for elements such as plutonium?
They are constantly giving out radioactive decay.
What is relative molecular mass?
The average mass of a molecule compared to 1/12th of the mass of an atom of carbon-12
Relative formula mass
The average mass of a formula unit, compared to 1/12thvof the mass of an atom of carbon 12
USED IN IONIC AND GIANT COVALENT COMPOUNDS.
What is meant by the term relative isotopic mass?
Mass of an atom of an isotope co pared to 1/12th of the mass of carbon 12.
