Atom Structure and Valence Electrons

A set of vocabulary flashcards based on the lecture covering electron shell capacities, specific atomic models, valence electrons, reactivity, and study instructions.

First Shell

The innermost electron shell of an atom, which can hold a maximum of $2$ electrons.

Second Shell

The second electron shell of an atom, which can hold a maximum of $8$ electrons.

Third Shell

The third electron shell of an atom, which can hold a maximum of $8$ electrons.

"Two eight eight electrons, we appreciate"

A classroom cheer used to remember the electron capacities of the first three shells ($2$, $8$, and $8$).

Sodium Electron Configuration

An atom with $11$ total electrons, configured with $2$ electrons on the inner shell, $8$ on the middle shell, and $1$ on the outer shell.

Potassium Electron Configuration

An atom with $19$ total electrons, configured with $2$ electrons on the first shell, $8$ on the second shell, $8$ on the third shell, and $1$ on the fourth shell.

Valence Shell

The outer shell of an atom.

Valence Electrons

The electrons located on the outer shell of an atom that determine whether the atom will be reactive or not.

Reactive

Having a chemical reaction upon coming in contact with substances such as water or air.

Fluorine Valence Electrons

Fluorine has $7$ valence electrons on its outer shell.

Neon Valence Electrons

Neon has $8$ valence electrons on its outer shell.

Boron Valence Electrons

Boron has $3$ valence electrons on its outer shell, with $2$ electrons on its inner shell.

Beryllium (Be)

An atom containing $4$ total electrons, configured with $2$ electrons on the first shell and $2$ electrons on the second shell.

Blue Pages

Course pages where students should briefly look at the content and vocabulary without spending a lot of time.

Watch, Read, and Complete

The core learning components where students are instructed to spend most of their time.