Statement 1: Mendeleev placed every element strictly in order of increasing relative atomic mass.
Statement 2: In the modern Periodic Table, the elements are placed in order of atomic number.
Statement 3: Mendeleev put elements with similar chemical properties in the same group, even where this meant leaving gaps.
Statement 4: The noble gases were included as Group 0 in Mendeleev's first Periodic Table.
Which statements are correct?
2 and 3 only
1, 2 and 3 only
2, 3 and 4 only
1 and 4 only
64 exam-style questions on OCR GCSE Chemistry 2.2 Bonding, covering 2.2.1 Metals, non-metals and the Periodic Table, 2.2.2 Types of chemical bonding and dot and cross diagrams, 2.2.3 Limitations of bonding models, and 2.2.4 Reactivity, atomic number and the modern Periodic Table. Each one has a worked solution and a mark scheme showing where the marks go.