Which of the following was not a part of Dalton's atomic theory?
A) Each element is composed of atoms, which are identical for that element.
B) The reactivity of elements involves changes in their electron configuration.
C) Chemical combination is the bonding of a definite number of atoms of each of the combining elements.
D) No atoms are gained, lost, or changed in identity during a chemical reaction.

Question

Quizplus · Accepted Answer

Dalton's atomic theory, formulated in the early 19th century, did not include the concept of electron configurations. This idea was developed later with the advent of quantum mechanics and the discovery of subatomic particles. Dalton's theory focused on the indivisibility of atoms, the conservation of atoms in reactions, and the fixed composition of compounds, without delving into the structure of atoms themselves.

Which of the Following Was Not a Part of Dalton's