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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 - all elemen... 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
- Subatomic Particles: Dalton's model stated that atoms are indivisible, while today's model recognizes that atoms consist of subatomic particles such as protons, neutrons, and electrons.
- Variability of Atoms: In Dalton's model, all atoms of the same element were considered identical. Today's model acknowledges that atoms of the same element can have different numbers of neutrons, resulting in different isotopes.
Step 2