End of Semester Exam Revision

Match each particle arrangement to its corresponding state of matter.

• gas

• 
• liquid

• 
• solid

• 

Which of the following statements best describe the movement of molecules in the liquid state?

• The molecules are not moving from place to place.

• The molecules are sliding over each other.

• Molecules are fixed in position and only vibrate.

• Molecules are in constant random motion.

Match each type of structure to its corresponding diagram.

• metallic

• 
• giant ionic

• 
• simple molecular

• 
• giant molecular

• 

Complete the following sentences:

Sodium chloride is an (a)   compound. It does not conduct electricity when it is a​ (b)   because the ions cannot move. When it is ​ (c)   , sodium chloride does conduct electricity because the ions are free to move.

• ionic
• solid
• molten

Match the term to the correct change of state

• boiling

• sublimation

• freezing

• condensation

• melting

Which changes of state involve energy being released?

Which three substances are solids at room temperature?

Which one is a gas at room temperature?

Which two substances are liquids at room temperature?

Which one is an impure substance?