Electron Configuration and Stability Concepts

The video tutorial by Chris Harris covers subshells, orbitals, and electron configurations. It explains the types of subshells (s, p, d, f) and their role in shaping the periodic table. The tutorial details how to determine electron configurations, using examples like carbon and iron, and introduces noble gas configurations. It highlights exceptions in transition metals, specifically chromium and copper, and discusses ionization in these metals.

What is the maximum number of electrons that an s subshell can hold?

• 14

• 2

• 6

• 10

Which block of the periodic table is associated with elements that have their outermost electrons in the d subshell?

• d block

• p block

• f block

• s block

In electron configuration, what does the letter in the notation (e.g., 's' in 1s²) represent?

• Shell number

• Number of electrons

• Subshell type

• Atomic number

How is the electron configuration of carbon represented?

• 1s² 2s² 2p²

• 1s² 2s² 2p⁶

• 1s² 2p² 3s²

• 1s² 2s² 3p²

What is the noble gas configuration for selenium?

• [Xe] 6s² 4f¹⁴ 5d¹⁰ 6p⁴

• [Ne] 3s² 3p⁴

• [Kr] 5s² 4d¹⁰ 5p⁴

• [Ar] 4s² 3d¹⁰ 4p⁴

Which of the following elements has an electron configuration exception due to stability?

• Neon

• Iron

• Chromium

• Sodium

For chromium, what is the correct electron configuration considering its exception?

• 4s² 3d⁵

• 4s¹ 3d⁴

• 4s¹ 3d⁵

• 4s² 3d⁴

When ionizing transition metals, from which subshell are electrons removed first?

• 2s

• 4s

• 3d

• 5p

What is the electron configuration for Fe³⁺?

• [Ar] 3d⁶

• [Ar] 4s² 3d⁶

• [Ar] 3d⁵

• [Ar] 4s¹ 3d⁶

Which element's electron configuration is affected by an electron jumping from the 4s to the 3d subshell for stability?

• Copper

• Cobalt

• Nickel

• Zinc