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NEET 2023, Chemistry Q17: Introduction And Atomic Models

NEET2023Chemistry
Q.

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 kg.

C. All the isotopes of a given elements 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:

  1. A

    C, D and E only

  2. B

    A and E only

  3. C

    B, C and E only

  4. D

    A, B and C only

Solution

A is wrong — atoms contain three fundamental particles (proton, neutron, electron). D is wrong — nucleons are protons and neutrons, not protons and electrons.

B (electron mass), C (isotopes have identical chemical behaviour because they share the same electron configuration), and E (Dalton viewed the atom as the ultimate, indivisible unit) are all correct.

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