DALTON'S ATOMIC THEORY - Practice Questions & MCQ

Which of the following postulates of Dalton's Atomic Theory was later found to be incorrect based on the discovery of isotopes?

Select the correct statement from the following:
A. Atoms of all elements are composed of two fundamental particles.
B. The mass of the electron is .
C. All the isotopes of given elements show the same chemical properties.
D. Protons and electrons are collectively known as nucleons
E. Dalton's atomic theory regarded the atom as an ultimate particle of matter.
Choose the correct answer from the option given below: