Mastering Orbital Diagrams and Electron Configuration Principles

The video tutorial explains orbital diagrams, which visually represent electron positions in atoms. It covers the Aufbau principle, which dictates the order of orbital filling based on energy levels, the Pauli Exclusion Principle, which limits orbitals to two electrons with opposite spins, and Hund's Rule, which describes electron distribution across orbitals. The tutorial also demonstrates drawing orbital diagrams for calcium and nitrogen, emphasizing the application of these principles.

What additional information does an orbital diagram provide compared to Bohr's diagram?

• Energy levels only

• Sublevels and orbitals

• Atomic mass

• Proton count

According to the Aufbau principle, which orbital is filled first?

• 4s

• 1s

• 3s

• 2p

What is the main idea of the Pauli Exclusion Principle?

• Electrons fill the highest energy orbital first

• Each orbital can hold a maximum of two electrons with opposite spins

• Electrons prefer to be in pairs

• Electrons fill orbitals randomly

What is another name for Hund's Rule?

• Aufbau's Rule

• Empty Bus Seat Rule

• Pauli's Rule

• Electron Pairing Rule

When applying Hund's Rule, how do electrons fill orbitals?

• They fill the highest energy orbital first

• They fill the lowest energy orbital first

• They fill each orbital singly before pairing

• They pair up in each orbital immediately

How many electrons does calcium have, and what is its atomic number?

• 20 electrons, atomic number 20

• 18 electrons, atomic number 18

• 22 electrons, atomic number 22

• 24 electrons, atomic number 24

In the orbital diagram for calcium, which orbital is filled after 3p?

• 3d

• 4s

• 2p

• 5s

What is the atomic number of nitrogen, and how many electrons does it have?

• 7, 7 electrons

• 6, 6 electrons

• 8, 8 electrons

• 5, 5 electrons

In nitrogen's orbital diagram, how are the electrons distributed in the 2p orbitals?

• Each electron occupies a separate orbital

• All electrons pair up in one orbital

• Two electrons pair up, one remains unpaired

• All electrons remain unpaired

Which principle or rule explains why electrons occupy separate orbitals before pairing up?

• Pauli Exclusion Principle

• Bohr's Rule

• Hund's Rule

• Aufbau Principle