Skip to content

Course home

x
3.1.2 Relative formula mass
x

Relative atomic mass and relative formula mass

Relative atomic mass and relative formula mass

Relative atomic mass, ArA_rAr​, compares the average mass of atoms of an element with one twelfth of the mass of a carbon-12 atom. Read the ArA_rAr​ value from the periodic table, usually the larger number shown by the element symbol.

3.1.2 Relative formula mass Lesson

  1. GCSE
  2. /Chemistry
  3. /3.1.2 Relative formula mass

Step-by-step lessons on AQA GCSE Chemistry 3.1.2 Relative formula mass. Each one builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.

Lessons