Lewis structures (reg)

Front

What does each line in a Lewis structure represent?

Back

Each line represents a pair of shared electrons.

Front

What is the correct formula for ammonia?

Back

NH₃

Front

What is the Lewis structure for carbon dioxide (CO₂)?

Back

O=C=O (two double bonds between carbon and oxygen)

Front

Which Lewis structure represents phosphorus tribromide (PBr₃)?

Back

Structure D (the correct Lewis structure for PBr₃)

Front

What type of bond exists between carbon and nitrogen in HCN?

Back

Triple bond

Front

How many valence electrons does carbon have?

Back

4 valence electrons.

Front

What is the octet rule in chemistry?

Back

Atoms tend to bond in such a way that they have eight electrons in their valence shell.

Front

What is a lone pair in a Lewis structure?

Back

A lone pair is a pair of valence electrons that are not shared with another atom.

Front

How do you determine the central atom in a Lewis structure?

Back

The central atom is usually the least electronegative element or the one that can form the most bonds.

Front

What is the significance of formal charge in Lewis structures?

Back

Formal charge helps to determine the most stable Lewis structure by minimizing charge separation.