Electron Configuration Diagrams

The video tutorial explains the structure of an atom, focusing on how electrons are arranged in energy levels or shells around the nucleus. It covers the rules for filling these shells, using lithium as an example, and provides a shorthand notation for electron configurations. The tutorial also includes a practice exercise with carbon, emphasizing the importance of understanding electron configurations for the first 20 elements.

What is the primary factor that determines the arrangement of electrons in an atom?

• The energy levels or shells

• The type of chemical bonds

• The size of the atom

• The number of protons

In the electron configuration of a lithium atom, where does the third electron go?

• Into the first shell

• It remains unpaired

• Into the second shell

• Into the third shell

What is the maximum number of electrons that the second shell can hold?

• 2 electrons

• 4 electrons

• 6 electrons

• 8 electrons

How would you write the electron configuration for a calcium atom using shorthand notation?

• 2.8.8.2

• 2.8.8.4

• 2.8.8.8

• 2.8.2.8

For a carbon atom, what is the electron configuration in numbers?

• 2.4

• 2.8

• 2.2

• 2.6