Question

Which of these discoveries contradict components of Dalton’s atomic theory? Check all of the boxes that apply. Atoms contain smaller particles: protons, neutrons, and electrons. Atoms of a given element can bond to other atoms only in specific ways. Atoms of a given element can have different numbers of neutrons. Nuclear reactions can change an atom of one element into an atom of another element. All atoms of a given element have the same number of protons.

Answer 1

Atoms of a given element can have different numbers of neutrons.

Nuclear reactions can change an atom of one element into an atom of another element.

Atoms contain smaller particles: protons, neutrons, and electrons.

Answer 2

Explanation:

According to Dalton's atomic theory, all the atoms are individual, all the atoms of the same element are identical in properties and mass, the compound is formed from two or more kinds of the atoms, all the matter is made up of small atoms and the chemical reaction is a rearrangement of the atoms.

The discoveries which contradicts the components of Dalton's atomic theory from the given discoveries are:

Nuclear reactions can change an atom of one element into an atom of another element.

Atoms of a given element can have different numbers of neutrons.

Atoms contain smaller particles: protons, neutrons, and electrons.