In 1869, Dmitri Mendeleev published a periodic table of the elements that were known at the time.
State the property that Mendeleev used to put the elements in order.
Mendeleev put some elements in the same column. State what these elements had in common.
Mendeleev left gaps in his table. Give the reason for the gaps.
Mendeleev predicted the properties of some elements. Suggest how scientists could later check whether his predictions were correct.
The modern periodic table puts elements in order of atomic number. State what the atomic number tells you about an atom.
Give one other way the modern periodic table is different from Mendeleev's table.
50 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.