1. Which of the elements shown are liquid at standard temperature and pressure?


2. Which of the elements shown are a gas at standard temperature and pressure?


3. Look at Figure 1. In general, do the nonmetals or metals have higher melting points?


4. Look at Figure 1. In general, do the nonmetals or metals have higher boiling points?


5. Explain what the data shown in Figure 1 suggest about the strengths of the intermolecular forces between particles in the substances.