MP3: Three weeks test AP chemistry

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

How many valence electrons does phosphorus (P) have?

Back

Phosphorus has 5 valence electrons.

Front

What is the molecular geometry of PBr3?

Back

The molecular geometry of PBr3 is trigonal pyramidal.

Front

How many lone pairs are present in HCl?

Back

HCl has 3 lone pairs.

Front

What type of bond does hydrogen (H) form?

Back

Hydrogen only forms single bonds.

Front

What is the Lewis structure for ammonia (NH3)?

Back

The Lewis structure for NH3 shows nitrogen (N) in the center with three hydrogen (H) atoms bonded to it and one lone pair of electrons on nitrogen.

Front

What happens when NH3 reacts with BF3?

Back

NH3 donates a pair of electrons to BF3, forming a coordinate covalent bond.

Front

What is a coordinate covalent bond?

Back

A coordinate covalent bond is a type of covalent bond where one atom provides both electrons for the bond.

Front

What is the significance of lone pairs in molecular geometry?

Back

Lone pairs can affect the shape of a molecule by repelling bonding pairs of electrons, leading to different molecular geometries.

Front

What is the difference between single, double, and triple bonds?

Back

Single bonds involve one pair of shared electrons, double bonds involve two pairs, and triple bonds involve three pairs.