7.2C Covalent Lewis Structures

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds with other atoms.

Front

How many valence electrons does carbon have?

Back

Carbon has 4 valence electrons.

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.

Front

How do you determine the total number of valence electrons in a molecule?

Back

Add the valence electrons of all the atoms in the molecule.

Front

What is the significance of unshared electron pairs in Lewis structures?

Back

Unshared electron pairs, or lone pairs, can affect the shape and reactivity of a molecule.

Front

What is the molecular formula for ammonia (NH3)?

Back

The molecular formula for ammonia is NH3.

Front

How many double bonds are present in CHCl3?

Back

CHCl3 has 0 double bonds.

Front

When writing Lewis structures, which electrons are used?

Back

Only valence electrons are used when writing Lewis structures.

Front

What is the octet rule?

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

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

Back

A single bond involves one pair of shared electrons, while a double bond involves two pairs of shared electrons.