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The scientist John Dalton lived over 200 years ago - Edexcel - GCSE Chemistry - Question 2 - 2021 - Paper 1
Question 2
The scientist John Dalton lived over 200 years ago. (a) John Dalton suggested an early model of atoms. When Dalton first described atoms he said that that -... show full transcript
Worked Solution & Example Answer:The scientist John Dalton lived over 200 years ago - Edexcel - GCSE Chemistry - Question 2 - 2021 - Paper 1
Step 1
Give two differences between Dalton's model of atoms and today's model of atoms.
Answer
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Dalton's model proposed that atoms are indivisible, whereas today's model acknowledges that atoms are made up of subatomic particles (protons, neutrons, electrons).
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In Dalton's model, all atoms of a particular element are identical; today, we know that atoms of the same element can have different numbers of neutrons, resulting in isotopes.
Step 2