Exploring Electron Configurations and Block Diagrams

This video tutorial explains how to write electron configurations and draw orbital block diagrams for the first 18 elements of the periodic table. It covers the ground state electron configurations, emphasizing that the number of electrons equals the atomic number. The tutorial details the configurations for each element from hydrogen to argon, following the Aufbau principle and Hund's Rule. The video concludes with a preview of the next tutorial, which will cover elements 19 through 30.

What is the relationship between the number of protons and electrons in an atom in its ground state?

• Protons and electrons are unrelated

• Protons equal electrons

• Protons are always less than electrons

• Protons are always more than electrons

What is the electron configuration for hydrogen?

• 1s2

• 2s1

• 2p1

• 1s1

How many electrons are in the 1s orbital of helium?

• 3

• 1

• 2

• 4

What is the electron configuration for carbon?

• 1s2 2s2 2p4

• 1s2 2s2 2p3

• 1s2 2s2 2p2

• 1s2 2s2 2p5

According to Hund's Rule, how are electrons distributed in the p orbitals of carbon?

• All electrons are spin up

• All electrons are spin down

• Electrons are distributed with one in each orbital before pairing

• All electrons pair up in one orbital

What is the electron configuration for neon?

• 1s2 2s2 2p6

• 1s2 2s2 2p5

• 1s2 2s2 2p4

• 1s2 2s2 3p6

What is the electron configuration for sodium?

• 1s2 2s2 2p6 3p2

• 1s2 2s2 2p6 3s2

• 1s2 2s2 2p6 3p1

• 1s2 2s2 2p6 3s1

How many electrons are in the 3s orbital of magnesium?

• 1

• 4

• 2

• 3

What is the electron configuration for phosphorus?

• 1s2 2s2 2p6 3s2 3p1

• 1s2 2s2 2p6 3s2 3p2

• 1s2 2s2 2p6 3s2 3p3

• 1s2 2s2 2p6 3s2 3p4

How many electrons are in the 3p orbital of argon?

• 2

• 6

• 8

• 4