Electron Configurations of the First 36 Elements

This video tutorial by MSJ Chem covers the electron configurations of the first 36 elements in the periodic table. It begins with an introduction to electron configuration notation, explaining energy levels, sublevels, and electron counts. The video then details the configurations for elements from Hydrogen to Neon, using orbital diagrams. It proceeds with abbreviated configurations for elements Sodium to Argon, employing noble gas notation. The tutorial continues with configurations for Potassium to Zinc, highlighting exceptions to the Aufbau principle, and concludes with configurations for Gallium to Krypton, focusing on the 4p sublevel.

What does the number in front of an electron configuration indicate?

• The number of electrons in the atom

• The main energy level

• The atomic number

• The type of sublevel

Which element has the electron configuration 1s2 2s1?

• Boron

• Beryllium

• Lithium

• Helium

What is the electron configuration for Neon?

• 1s2 2s2 2p6

• 1s2 2s2 2p3

• 1s2 2s2 2p4

• 1s2 2s2 2p5

Which noble gas is used in the abbreviated electron configuration for Sodium?

• Argon

• Neon

• Krypton

• Helium

What is the electron configuration for Magnesium?

• [Ne] 3p1

• [Ne] 3s1

• [Ne] 3p2

• [Ne] 3s2

Which element has an electron configuration that is an exception to the Aufbau principle?

• Titanium

• Iron

• Chromium

• Manganese

What is the electron configuration for Copper?

• [Ar] 4s1 3d9

• [Ar] 4s2 3d10

• [Ar] 4s2 3d9

• [Ar] 4s1 3d10

Which element has the electron configuration [Ar] 4s2 3d10?

• Gallium

• Zinc

• Copper

• Nickel

What is the electron configuration for Gallium?

• [Ar] 4s2 3d10 4p3

• [Ar] 4s2 3d10 4p1

• [Ar] 4s2 3d10 4p4

• [Ar] 4s2 3d10 4p2

Which element has the electron configuration [Ar] 4s2 3d10 4p3?

• Germanium

• Arsenic

• Selenium

• Bromine