9th Class

9th Class Chemistry Chapter 2 Quiz with Answers

“9th Class Chemistry Chapter 2 Quiz: Structure of Atoms” uncovers the mysteries of atomic structure, enabling one to understand more about the building blocks of matter. This chapter is very important for MDCAT students because it explains the details of atomic models, subatomic particles, and their arrangement in the atom—basics necessary for the mastery of chemistry. Our MDCAT Quiz for this chapter is designed to meticulously make students ace these critical topics.

Historically, the development of atomic theories is described, from Dalton’s atomic theory to the present day’s atomic model. The discovery of electrons, protons, and neutrons is discussed, including their importance in the definition of atomic structure. Isotopes, atomic number, mass number, electron shells, and electron subshells are explained by using the Bohr model, while quantum mechanics explains the way electrons are filled in the given orbitals according to energies. The Chapter also explains the relation of Atomic structure and Periodic Properties of elements.

MDCAT Quiz: Improve Your Knowledge of Atoms

Our MDCAT Quiz for Chapter 2 is designed to cover important topics such as atomic models, electron configurations, and isotopes. These quizzes are designed according to the MDCAT standards, helping students practice complex questions and identify areas needing improvement. Regular practice boosts your confidence and ensures readiness for tackling atom-related questions in the MDCAT exam.

  • Test Name: 9th Class Chemistry Chapter 2 Quiz
  • Type: Quiz Test
  • Total Questions: 30
  • Total Marks: 30
  • Time: 30 minutes

Note: Answer of the questions will change randomly each time you start the test, once you are finished, click the View Results button.

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Free Flashcards for Structure of Atoms

Revise effectively with our free flashcards for Chapter 2. The flashcards will cover important terms such as the orbital configuration, isotopes and isobars, atomic spectra, and electron shells, hence easily reviewing and remembering key information from the chapter. Flashcards are great for quick learning and last-minute revision.

What is the maximum number of electrons in the p subshell?

6

Who proposed the quantum mechanical model of the atom?

Werner Heisenberg

What is the electron configuration of sodium?

1s² 2s² 2p⁶ 3s¹

What is the electron configuration of oxygen?

1s² 2s² 2p⁴

What is the electron configuration of carbon?

1s² 2s² 2p²

What is the principal quantum number range for an electron in the s subshell?

1 to ∞

What is the principal quantum number range for an electron in the p subshell?

2 to ∞

What is the principal quantum number range for an electron in the d subshell?

3 to ∞

What is the magnetic quantum number range for an orbital in the s subshell?

-1 to +1

What is the magnetic quantum number range for an orbital in the p subshell?

-1 to +1

What is the magnetic quantum number range for an orbital in the d subshell?

-2 to +2

What is the shape of an f orbital?

Cloverleaf-shaped

What is the shape of a d orbital?

Dumbbell-shaped

What is the shape of a p orbital?

Dumbbell-shaped

What is the maximum number of electrons in the third shell?

18

What is the maximum number of electrons in the second shell?

8

What is the maximum number of electrons in the first shell?

2

What is the maximum number of electrons in an orbital?

2

Which quantum number determines the shape of an orbital?

Azimuthal (l)

Who proposed the wave mechanical model of the atom?

Erwin Schrödinger

What is the shape of an s orbital?

Spherical

Which of the following is not true about electrons?

They are negatively charged

What is the Bohr radius?

Distance from the nucleus to the electron in the first shell

Which of the following determines the mass of an atom?

Protons and neutrons

Which scientist discovered the neutron?

James Chadwick

Which subatomic particle has a negligible mass?

Electron

What is the mass number of an element?

Sum of protons and neutrons

What is the atomic number of an element?

Number of protons

Which of the following is not found in the nucleus?

Electron

Which subatomic particle is found in the nucleus?

Proton

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