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

Back

To determine the total number of valence electrons in a molecule, add the valence electrons of each atom in the molecule.

Front

What is a Lewis structure?

Back

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

Front

What is the significance of double bonds in Lewis structures?

Back

Double bonds indicate that two pairs of electrons are shared between two atoms, which can affect the molecule's shape and reactivity.

Front

How many valence electrons does phosphorus (P) have?

Back

Phosphorus has 5 valence electrons.

Front

How many valence electrons does bromine (Br) have?

Back

Bromine has 7 valence electrons.

Front

What is the correct Lewis structure for PBr3?

Back

The correct Lewis structure for PBr3 shows phosphorus in the center with three bromine atoms bonded to it and one lone pair of electrons on phosphorus.

Front

What is the molecular formula for ammonia?

Back

The molecular formula for ammonia is NH3.

Front

What is the maximum number of bonds that carbon can form?

Back

Carbon can form a maximum of four bonds due to its four valence electrons.

Front

What type of bond is formed when two atoms share one pair of electrons?

Back

A single bond is formed when two atoms share one pair of electrons.