Bonding Models and Lewis Structures: Crash Course Chemistry #24

A scientific model is:

• Anything that represents something else; whether physical or conceptual.

• Any person photographed wearing a lab coat and goggles.

All models are imperfect to some extent.

• True

• False

A Lewis Structure:

• Is a random bunch of dots situated around a few atomic symbols.

• Is a 3D model that represents bonds as straight lines and unbonded valence electrons as dots.

• Is a two-dimensional model that represents bonds as straight lines and unbonded valence electrons as dots.

Lewis structures work for ionic bonds as well as covalent bonds.

• True

• False

The most stable configuration for valence electrons is that the valence shell is full.  For many atoms that number is:

• It's different for every single atom.

• 7; like the Halogens

• 8; the Octet rule

Ionic bonds means electrons are:

• Shared

• Transferred

How many total electrons will be found inside carbon dioxide (CO₂)?

• 4

• 12

• 16

The double bond allows us to use all 16 electrons as well as fulfilling the octet rule.

• False

• True

The double bond cannot be the correct Lewis structure because we are still using 12 electrons and N₂ only has 10.

• False

• True

True covalent bonding is an overlap of electron clouds rather than a sharing of electrons.

• False

• True