Spec 1CH0
Revise Edexcel GCSE Chemistry 2.2 The periodic table with the question bank, lessons, revision guides, and flashcards.
1.13 Describe how Mendeleev arranged the elements known at the time in a periodic table. 1.14 Explain how Mendeleev used his table to predict the existence and properties of undiscovered elements. 1.15 Explain why the relative atomic masses of some pairs of elements are not in order of increasing relative atomic mass, in terms of the abundance of their isotopes. Assessed at both Foundation and Higher tier.
