Electron Configurations for Elements 1-14

This video tutorial covers the electron configurations for the first 21 elements. It begins with an introduction to the necessary materials and a review of key principles such as the Aufbau principle, Pauli exclusion principle, and Hund's rule. The tutorial then provides detailed instructions on writing electron configurations for elements from hydrogen to silicon, explaining each step and the reasoning behind it. The video emphasizes the importance of understanding these configurations as they are unique to each element and serve as their electronic signature.

Which principle states that electrons fill the lowest energy orbitals first?

• Heisenberg Uncertainty Principle

• Hund's Rule

• Pauli Exclusion Principle

• Aufbau Principle

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

• 1

• 2

• 3

• 4

What is the electron configuration for Hydrogen?

• 2s1

• 1s2

• 1s1

• 2p1

How many electrons are in the 2s orbital of Beryllium?

• 4

• 3

• 2

• 1

What is the electron configuration for Boron?

• 1s2 2s2 2p1

• 1s2 2s2 2p2

• 1s2 2s1 2p2

• 1s2 2s2 2p3

How many electrons are in the 2p orbital of Carbon?

• 4

• 3

• 2

• 1

What is the electron configuration for Nitrogen?

• 1s2 2s2 2p5

• 1s2 2s2 2p2

• 1s2 2s2 2p3

• 1s2 2s2 2p4

How many electrons are in the 2p orbital of Fluorine?

• 4

• 7

• 6

• 5

What is the electron configuration for Sodium?

• 1s2 2s2 2p6 3s1

• 1s2 2s2 2p6 3s2

• 1s2 2s2 2p6 3p1

• 1s2 2s2 2p6 3p2

Where does the 14th electron go in Silicon according to Hund's rule?

• 3s orbital

• 3p orbital

• 2p orbital

• 2s orbital