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The scientist John Dalton lived over 200 years ago - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2021 - Paper 1
Question 1
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 - all element... show full transcript
Worked Solution & Example Answer:The scientist John Dalton lived over 200 years ago - Edexcel - GCSE Chemistry Combined Science - Question 1 - 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 states that atoms are indivisible; however, modern atomic theory identifies that atoms are made of subatomic particles (protons, neutrons, and electrons).
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In Dalton's model, all atoms of the same element are identical; current theory recognizes that atoms of the same element can have different isotopes, which possess varying numbers of neutrons.
Step 2