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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 elements... 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 suggested that atoms are indivisible, while modern atomic theory recognizes that atoms are made up of smaller subatomic particles, including protons, neutrons, and electrons.
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Dalton’s model proposed that all atoms of the same element are identical, whereas today’s understanding acknowledges the existence of isotopes, which are atoms of the same element that differ in the number of neutrons.
Step 2