C2.1 - Development of the periodic table

Question 1

John Dalton’s version of the periodic table

Answer 1

• arranged them in order of their atomic weight
• published the ‘table of elements’
• his table included compounds

Question 2

Johan Dobereiner’s version of the periodic table

Answer 2

• law of triads

Question 3

John newland’s version of the periodic table

Answer 3

• Law of octaves
• elements were ordered in order of weight
• every 8th element was similar
• didn’t take into account the yet to be discovered elements

Question 4

Dmitri Mendeleev’s version of the periodic table

Answer 4

• ordered in order of atomic weight
• arranged so that periodic pattern was clear
• left gaps for missing elements + predicted their properties using the table