Lecture Week 4_2.3 Electronic Configuration

The electron fills in the orbital from lower to the higher energy of orbital. State the name of rule used for the statement above.

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Answer explanation

Aufbau's Principle

An orbital can at most hold how many electrons?

• 1 electron
• 2 electrons
• 3 electrons
• 4 electrons

Which of the following statements regarding electronic orbitals is/are correct?

• Each p-orbital can hold a maximum of six electrons.

• The 3p-orbitals have a higher energy level than the 3s-orbital.

• The three 3p-orbitals have slightly different energy levels.

• The 1s-orbital has the same size and shape as the 2s-orbital.

Which one of the following does not represent the electronic configuration of an atom in its ground state?

• 1s² 2s² 2p³

• 1s² 2s² 2p⁴

• 1s² 2s² 2p⁶ 3s¹

• 1s² 2s² 2p⁶ 3d¹

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

• 3
• 6
• 8
• 10

What electron configuration matches an sulphur atom?

(Z =16)

• 1s²2s²2p⁶3s2, 3p⁶4s²3d¹⁰4p⁵

• 1s²2s²2p⁴

• 1s²2s²2p⁶ 3s² 3p⁴

• 1s²2s²2p⁶3s²3p⁶4s²3d¹

No two electrons in the same orbital can have the same set of four quantum numbers (n,l,m,s)

• Aufbau principle

• Pauli exclusion principle

• Hund’s rule

• Noble gas notation

Which orbital shows a violation of the Pauli Exclusion Principle?

• A

• B

• C

• D

Which of the following is the degenerate orbitals

• 4p orbitals

• 3s orbital

• 4s orbital

• 3d orbitals

What is incorrect about this orbital diagram?

• Both arrows in the filled 2p box should be pointing the same direction

• There is nothing incorrect with this diagram

• In 2p orbital there should only be 1 arrow in the first 2p box and another one arrow in the 2nd 2p box where both arrow pointing upward

• All the arrows should be pointing the same direction.