U6L3 - Pre Flashcard - Molecular Structures

Front

What are resonance structures?

Back

Resonance structures are different ways of drawing the same molecule that show the delocalization of electrons. They help represent the actual structure of a molecule more accurately.

Front

Why are resonance structures used when drawing the nitrate ion?

Back

Equivalent structures can be used to represent the ion.

Front

What is a structural formula?

Back

A structural formula is a molecular model that uses letter symbols and bonds to show the relative positions of atoms in a molecule.

Front

What information does a molecular formula provide?

Back

A molecular formula tells you the type and number of each atom in a molecule.

Front

What is the difference between a molecular model and a structural formula?

Back

A molecular model represents the 3D arrangement of atoms, while a structural formula shows the connectivity of atoms using symbols and lines.

Front

What is the significance of the nitrate ion's resonance structures?

Back

They indicate that the actual structure of the nitrate ion is a hybrid of the resonance forms, reflecting the delocalization of electrons.

Front

What does the term 'delocalization of electrons' mean?

Back

Delocalization of electrons refers to the spreading out of electrons across multiple atoms, rather than being localized between two atoms.

Front

What is a ball-and-stick model?

Back

A ball-and-stick model is a molecular model that represents atoms as balls and chemical bonds as sticks, illustrating the 3D arrangement of atoms.

Front

What is a space-filling molecular model?

Back

A space-filling molecular model shows the relative sizes of atoms and how they occupy space in a molecule, providing a more realistic representation.

Front

What is the purpose of using molecular models in chemistry?

Back

Molecular models help visualize the structure and arrangement of atoms in a molecule, aiding in understanding chemical properties and reactions.