Quantum Mechanical Model

How many orbitals are present in the 4p sub level?

• 7

• 5

• 4

• 3

If the first and second energy levels of an atom are full, then what would be the total number of electrons in the atom?

• 6

• 8

• 10

• 18

According to Pauli Exclusion Principle, how many electrons may occupy a single orbital?

• 1

• 2

• 4

• 8

“An electron should occupy the lowest energy level first before the higher energy level” is stated in what rule?

• Hund's rule

• Pauli Exclusion Principle

• Aufbau Principle

• All of the above.

What rule states that single electrons must occupy each equal-energy orbital before additional electrons can occupy the same orbitals.

• Hund's rule

• Pauli Exclusion Principle

• Aufbau Principle

• None of the choices.

Which of the following statement is wrong?

• Two electrons must occupy each equal energy orbital before additional electrons can occupy the same orbitals.

• A maximum of two electrons may occupy the same orbitals.

• In filling up orbitals, electron occupies the lowest energy orbital first before the higher energy orbitals.

• None of the choices.

What is the electron configuration of Argon?

• 1s² 2s² 2p⁶

• 1s² 2s² 2p⁶ 3s¹

• 1s² 2s² 2p⁶ 3s²

• 1s² 2s² 2p⁶ 3s² 3p⁶

Which atom has an electron configuration of 1s² 2s² 2p⁶?

• He

• Ne

• Ar

• Xe

Which one of the following electron configurations is INCORRECT?

• 1s² 2s² 2p⁶ 3s² 3p⁶

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p³

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁵

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁹ 4p²

Which of the following electron configurations is CORRECT?

• 1s² 2s³

• 1s² 2s² 2p⁶

• 1s² 2s² 3s²

• 1s² 2s² 2p⁶ 3s² 4s²