Bonding models | Exit Quiz | Oak National Academy

Which model is used to show how chemical bonds are formed between atoms?

• Space-filling model

• Ball-and-stick model

• Dot-and-cross diagram

• Displayed formula

Answer explanation

It uses dots and crosses to show the electrons involved in bonding.

Which model is best for showing the relative sizes of atoms?

• Space-filling model

• Ball-and-stick model

• Dot-and-cross diagram

• Displayed formula

Answer explanation

This model shows atoms as spheres that fill the space around them.

Which model can only be used to show covalent bonds (not ionic bonds)?

• Space-filling model

• Ball-and-stick model

• Dot-and-cross diagram

• Displayed formula

Answer explanation

Each line represents a shared pair of electrons between two atoms (covalent bonding).

Which of the following is a key advantage of the displayed formula?

• It shows the three-dimensional shape of molecules.

• It accurately represents the sizes of atoms.

• It clearly shows all atoms and bonds in a molecule.

• It shows how electrons are shared between atoms.

Answer explanation

The displayed formula is a 2D representation.

Which model are these statements about? Advantage: It clearly shows which electrons come from which atom. Limitation: It does not show the 3D structure of the chemical.

• Ball-and-stick model

• Dot-and-cross diagram

• Space-filling model

• Displayed formula

Answer explanation

This model uses dots and crosses to indicate the origin of electrons from different atoms, clearly showing how bonds are formed. However, it does not provide a three-dimensional view.

The space-filling model is useful for visualising molecular size and shape, while the ___ model shows the 3D arrangement of atoms and bonds, which helps visualise molecular geometry.

Answer explanation

The space-filling model is useful for visualising molecular size and shape, while the ball-and-stick model shows the 3D arrangement of atoms and bonds, which helps visualise molecular geometry.