Lewis Structures 2020-2021

Front

What is a Lewis structure?

Back

A Lewis structure is a diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.

Front

What does the octet rule state?

Back

The octet rule states that atoms tend to bond in such a way that they have eight electrons in their valence shell, achieving a stable electron configuration.

Front

How many valence electrons are in a fluorine atom?

Back

Fluorine has 7 valence electrons.

Front

What is the significance of shared electrons in a covalent bond?

Back

Shared electrons in a covalent bond allow atoms to achieve a full valence shell, contributing to molecular stability.

Front

How many electrons does a single line in a Lewis structure represent?

Back

A single line in a Lewis structure represents 2 shared electrons.

Front

What is the total number of valence electrons in a nitrate ion (NO3-) structure?

Back

The nitrate ion (NO3-) has a total of 24 valence electrons.

Front

What is the role of lone pairs in Lewis structures?

Back

Lone pairs are pairs of valence electrons that are not shared with other atoms and can affect the shape and reactivity of the molecule.

Front

How do you determine the central atom in a Lewis structure?

Back

The central atom is usually the least electronegative element or the one that can form the most bonds.

Front

What is a resonance structure?

Back

A resonance structure is one of two or more valid Lewis structures for a molecule that cannot be represented accurately by a single structure.

Front

What is the difference between a single bond, double bond, and triple bond?

Back

A single bond involves one pair of shared electrons, a double bond involves two pairs, and a triple bond involves three pairs of shared electrons.