Take this Exam: GCSE Chemistry: Structure and Properties | Zestly

Question 1

What is the defining structural feature of a polymer?

Accepted Answer

Long chains of repeating units joined by strong covalent bonds.

Question 2

In a metallic bond, what is responsible for the ability of the metal to conduct electricity and heat?

Accepted Answer

The presence of delocalized electrons that can move throughout the structure.

Question 3

Which of the following properties are characteristic of giant covalent structures?

Accepted Answer

Very high melting points due to the need to break many strong covalent bonds.

Question 4

What happens to the particles of a substance during the process of sublimation?

Answer

They lose kinetic energy and form a liquid.

Answer

They gain enough energy to move from a liquid to a gas.

Answer

They lose energy and transition directly from a gas to a solid.

Answer

They gain enough energy to transition directly from a solid to a gas.

Question 5

Which of the following statements accurately compare the bonding in simple molecular substances versus giant covalent structures?

Answer

Simple molecular substances have weak intermolecular forces, while giant covalent structures have only strong covalent bonds.

Answer

Simple molecular substances consist of a fixed number of atoms, whereas giant covalent structures have an indefinite number of atoms.

Answer

Both types of substances rely on ionic bonds to maintain their structure.

Answer

Giant covalent structures have lower melting points than simple molecular substances.