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Relative masses of atoms and molecules
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Comparing atomic masses

Comparing atomic masses

A schematic diagram comparing a Carbon-12 atom on a balance scale with twelve 1-unit weights, indicating that 1 unit is 1/12th the mass of C-12. Beside it, a weighted average calculation for Chlorine yields 35.5.

Atoms are far too small to weigh conveniently in grams. Instead of using actual mass, chemists compare the masses of all atoms to a fixed standard.

Relative masses of atoms and molecules Lesson

  1. IGCSE
  2. /Chemistry
  3. /Relative masses of atoms and molecules

Step-by-step lessons on CIE IGCSE Chemistry Relative masses of atoms and molecules. Each one builds up to exam-style questions. Build a solid grasp of atomic structure, bonding and the mole concept early, since these underpin almost every other topic, then move on to the more calculation-heavy quantitative and organic chemistry content.

Lessons