Quantum

Each sub level has its maximum number of orbitals. How many orbitals are in the third principal energy level?

• 3

• 6

• 9

• 12

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

• 7

• 5

• 4

• 3

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.

Which of the following electron configurations is CORRECT?

• 1s² 2s³

• 1s² 2s² 2p⁶

• 1s² 2s² 3s²

• 1s² 2s² 2p⁶ 3s² 4s²

Tags

NGSS.HS-PS1-1

What model of the atom replaced Bohr's model?

• Heisenberg's model

• Thomson's model

• Rutherford's model

• Quantum Mechanical model

Regions in which electrons are likely to be found is called

• atomic orbitals

• principal energy level

• energy sublevel

• spin

The electron configuration of an atom is 1s²2s²2p⁶. The number of valence electrons in the atom is

• 6

• 8

• 2

• 10

Tags

NGSS.HS-PS1-1