Compared to a 1.0-gram sample of chlorine gas at standard pressure, a 1.0-gram sample of solid aluminum at standard pressure has (1) a lower melting point (2) a higher boiling point (3) a lower density (4) a greater volume

(2) a higher boiling point.

Justification:

1) These are teh melting point, boiling point, and density of chlorine and aluminum at STP (standard pressure and temperature).

                                            aluminum         chlorine

Melting point (°C)                  660.32             2470

density (g / ml)                            2.7                 0.0032

From it, you can see that (1) and (3) are false, while (2) is true: aluminum has a higher melting point.

2) You can predict that from the fact that aluminun is a solid metal, so it has a high melting point compared with any gas at STP (which chlorine is).

3) About the volumes, since the density of aluminum is much less than that of chlorine, the same amount in grams (1.0 g) will occupy a smaller volume.

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