Classify the solid states in terms of crystal types of the elements in the third period of the periodic table. Predict the trends in their melting points and boiling points.
Not sure what you mean by the third period. But if you mean the row that starts off with Sodium through Argon, only Sodium, Magnesium and Aluminum are metals with crystal types.
Sodium forms Body Center Cube Crystals.
Magnesium forms Face Centered Cube Crystals
Aluminum forms Face Centered Cube Crystals.
Then you have Silicon, which forms the same tetrahedral structure that diamonds (Carbon) make.
Phosphorus has several crystalline forms. Black phosphorus is like graphite.
Sulfur also has several crystalline forms. Rhombic and monoclinic S8 are best known.
Chlorine is a gas and doesn't have any crystalline forms at room temperature.
Comments
Not sure what you mean by the third period. But if you mean the row that starts off with Sodium through Argon, only Sodium, Magnesium and Aluminum are metals with crystal types.
Sodium forms Body Center Cube Crystals.
Magnesium forms Face Centered Cube Crystals
Aluminum forms Face Centered Cube Crystals.
Then you have Silicon, which forms the same tetrahedral structure that diamonds (Carbon) make.
Phosphorus has several crystalline forms. Black phosphorus is like graphite.
Sulfur also has several crystalline forms. Rhombic and monoclinic S8 are best known.
Chlorine is a gas and doesn't have any crystalline forms at room temperature.
Get the answer without doing the work? You're too lazy to pity.