Question

the english chemist john dalton formulated an atomic theory based on his observations. in 1897, j. j. thomson showed that negative charges could be made to move from one end of a cathode - ray tube to another, causing the tube to glow. because of this, thomson is credited with the discovery of the electron. dalton’s atomic theory 1. all elements are made up of tiny indivisible particles called atoms. 2. atoms of the same element are identical. the atoms of one element are different from the atoms of another element. 3. atoms of different elements chemically combine to form chemical compounds. 4. during chemical reactions, atoms are rearranged. atoms of one element cannot be changed into atoms of a different element as a result of a chemical change. which part of dalton’s atomic theory conflicted with thomson’s new data based on this information? 1 2 3 4

Explanation:

Dalton's theory stated atoms are indivisible. Thomson's discovery of electrons showed atoms have sub - atomic particles, thus conflicting with the idea of atoms being indivisible.

Answer:

1. All elements are made up of tiny indivisible particles called atoms.