47 Dalton's atomic theory agrees with modern atomic theory except for the statement that a. all matter is made up of small particles. b. atoms are not divided in chemical reactions. c. atoms of the same element are chemically alike. d. all atoms of the same element have the same mass.
Answers
Answer:
(d)
Explanation:
After the discovery of Isotopes, his theory that all atoms of the same element have the same mass was discarded.
The correct option for the question is - d.) all atoms of the same element have the same mass.
Atoms of the same chemical element do not necessarily have the same mass because, while the number of protons in the nucleus is the same, the number of neutrons is different. The majority of elements found in nature are mixes of many isotopes.
What is the one thing that all atoms of the same element share in common?
An element's atoms all have the same number of protons, yet each element's atoms have a distinct number of protons. All helium atoms, for example, have two protons, but no other element has two protons. This indicates that a hydrogen atom contains one proton and one electron if it is neutral.