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Structure of Atom
Sub-atomic Particles and Isotopes
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- fundamental particles and nucleons
All Questions
2023 1 question
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Select the correct statements from the following: A. Atoms of all elements are composed of two fundamental particles. B. The mass of the electron is $9.10939\times10^{-31}$ kg. C. All the isotopes of a given element show 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 options given below:
An atom has three fundamental particles; nucleons are protons and neutrons, so A and D are wrong.
An atom has three fundamental particles – electron, proton and neutron. The mass of the electron is $9.10939\times10^{-31}$ kg. Neutrons and protons, both are collectively known as nucleons. All the isotopes of a given element show same chemical properties. Dalton's atomic theory regarded atom as an ultimate particle of matter.