In 1869, Dmitri Mendeleev developed a periodic table by arranging the known elements. The modern periodic table contains several differences from Mendeleev's original design.
State one difference in the way elements are ordered in Mendeleev's periodic table compared with the modern periodic table.
80 exam-style questions on Edexcel GCSE Chemistry 2.2 The periodic table, covering 2.2.1 Mendeleev's periodic table, 2.2.2 Periods, groups, metals and non-metals, and 2.2.3 Electronic configuration and position in the periodic table. Each one has a worked solution and a mark scheme showing where the marks go.