Structure of Atom Quiz - CBSE Class 11 Science

Free practice quiz: Structure of Atom (CBSE Class 11 Science). 29 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 11 Science practice quiz has 29 multiple-choice questions on Structure of Atom, and 29 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which subatomic particle carries a positive charge?

   1. Electron
   2. Neutron
   3. Proton
   4. Photon
   Show answer

   Answer: C. Proton

   Protons are positively charged subatomic particles found in the nucleus of an atom.

2. What is the name of the central part of an atom?

   1. Electron cloud
   2. Orbital
   3. Nucleus
   4. Shell
   Show answer

   Answer: C. Nucleus

   The nucleus is the central part of an atom containing protons and neutrons.

3. What are the different types of orbitals?

   1. s, p, d, f
   2. s, p, d
   3. s, p
   4. Only s orbital
   Show answer

   Answer: A. s, p, d, f

   The four types of atomic orbitals are s, p, d, and f, each having a different shape and orientation.

4. What is the relationship between wavelength and frequency of electromagnetic radiation?

   1. Directly proportional
   2. Inversely proportional
   3. No relationship
   4. Exponentially related
   Show answer

   Answer: B. Inversely proportional

   The wavelength and frequency of electromagnetic radiation are inversely proportional (c = λν, where c is the speed of light).

5. What is the spin quantum number (s) and what values can it have?

   1. It describes the shape of the orbital, and can have values of 0, 1, 2...
   2. It describes the orientation of the orbital, and can have values of -1, 0, +1...
   3. It describes the spin of the electron, and can have values of +1/2 or -1/2.
   4. It describes the energy level, and can have values of 1, 2, 3...
   Show answer

   Answer: C. It describes the spin of the electron, and can have values of +1/2 or -1/2.

   The spin quantum number (s) describes the intrinsic angular momentum of the electron, and can have values of +1/2 or -1/2, representing spin up or spin down.

More questions in this quiz

Answers and explanations are in the full quiz.

1. What is the charge of an electron?
2. Which subatomic particle has no charge?
3. What is the mass of a proton approximately?
4. What is the mass of an electron approximately?
5. What determines the atomic number of an element?
6. What is an isotope?
7. What is the mass number of an atom?
8. What is the electronic configuration of Sodium (Na)?
9. Explain the concept of electronic shells and subshells.
10. What is the maximum number of electrons that can be accommodated in a p subshell?
11. What is the Aufbau principle?
12. What is Hund's rule of maximum multiplicity?
13. What is the Pauli exclusion principle?
14. Explain the significance of quantum numbers in describing an electron.
15. What is the de Broglie equation and what does it represent?
16. Explain Heisenberg's Uncertainty Principle.
17. What is the significance of the principal quantum number (n)?
18. What is the azimuthal quantum number (l) and what does it determine?
19. What is the magnetic quantum number (ml) and what does it determine?
20. Describe the limitations of Bohr's model of the atom.
21. What is the significance of the wave function (ψ) in quantum mechanics?
22. Explain the concept of atomic orbitals and their shapes.
23. How does the quantum mechanical model of the atom differ from the Bohr model?
24. Discuss the limitations of the quantum mechanical model of the atom.

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