Skip to content

Course home

x
2.2.2 Periods, groups, metals and non-metals
x

Atomic number fixes identity

Atomic number fixes identity

The atomic number is the number of protons in the nucleus. Every atom of one element has the same proton number, and no two elements have the same proton number.

2.2.2 Periods, groups, metals and non-metals Lesson

  1. GCSE
  2. /Chemistry
  3. /2.2.2 Periods, groups, metals and non-metals

Step-by-step lessons on Edexcel GCSE Chemistry 2.2.2 Periods, groups, metals and non-metals. 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