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Topic: Quantum mechanical model, orbitals, psi and psi-squared plots· Atomic Structure

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 × 10^-31 kg.C. All the isotopes of a given element show same chemical properties.D. Protons an…

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 \(9.10939 \times 10^{-31}\) 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 :

1. B, C and E only

2. A, B and C only

3. C, D and E only

4. A and E only

1 answer

Best answer

Answer: 1. B, C and E only

Key idea: Check each statement.

  • A. False: atoms are made of three fundamental particles (electron, proton, neutron).
  • B. True: electron mass is \(9.10939 \times 10^{-31}\) kg.
  • C. True: isotopes have the same electronic configuration, so the same chemical properties.
  • D. False: protons and neutrons are collectively nucleons.
  • E. True: Dalton regarded the atom as the ultimate indivisible particle.

Correct: B, C, E. Option 1.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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