7.2C Covalent Lewis Structures

Front

What is a covalent bond?

Back

A covalent bond is a chemical bond formed when two atoms share one or more pairs of electrons.

Front

What is a Lewis dot structure?

Back

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

Front

How many valence electrons does nitrogen (N) have?

Back

Nitrogen has 5 valence electrons.

Front

What is the molecular formula for ammonia?

Back

The molecular formula for ammonia is NH₃.

Front

How many lone pairs are in the Lewis structure of water (H₂O)?

Back

There are 2 lone pairs in the Lewis structure of water.

Front

What is the significance of lone pairs in Lewis structures?

Back

Lone pairs affect the shape and reactivity of molecules, influencing their physical and chemical properties.

Front

How many unshared pairs of electrons does each oxygen have in CO₂?

Back

Each oxygen in CO₂ has 2 unshared pairs of electrons.

Front

What is the Lewis structure for fluorine (F₂)?

Back

The Lewis structure for fluorine (F₂) shows two fluorine atoms sharing one pair of electrons.

Front

In CH₄, how many unshared electron pairs surround the carbon atom?

Back

In CH₄, there are 0 unshared electron pairs surrounding the carbon atom.

Front

What is the bond angle in a tetrahedral molecular geometry?

Back

The bond angle in a tetrahedral molecular geometry is approximately 109.5 degrees.