Chapter 2.2 - Relative mass

Question 1

What is the relative atomic mass?

Answer 1

The weighted mean mass of an atom of an element compared with 1/12 of the mass of an atom of carbon-12

Question 2

How do you calculate relative atomic mass?

Answer 2

Ar = (atomic number x percentage)/ 100
-> you do (atomic number x percentage) for as many isotopes required and combine them all

Question 3

What is the relative molecular mass?

Answer 3

The weighted mean mass of a molecule compared with 1/12 of the mass of an atom of carbon-12

Question 4

What is relative formula mass?

Answer 4

The weighted mean mass of the formulae of a compound compared with 1/12 of the mass of an atom of carbon-12

Question 5

What is relative isotopic mass?

Answer 5

The mass of an atom of an isotope compared with 1/12 of the mass of an atom of carbon-12

Question 6

What do mass spectroscopy traces show?

Answer 6

The relative abundances of each isotope of an element used to calculate the average mass of an atom for an element