AS-level AQA Physical Chemistry Exam Study Questions with Complete Solutions (Verified Correct Answers) Latest Update 2024
Who described atoms as solid spheres that make up different elements and when? - ANSWER John Dalton in the 19th century Who suggested that atoms of a particular element had the same mass and atoms of different elements had different masses and when? - ANSWER John Dalton in 1803 Who discovered the electron and when? - ANSWER JJ Thomson, 1897 discovered electrons proving atoms weren't indivisible or solid
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as level aqa physical chemistry exam