Chapter 12, Problem 12b
Silicon is the fundamental component of integrated circuits. Si has the same structure as diamond. (b) Silicon readily reacts to form silicon dioxide, SiO2, which is quite hard and is insoluble in water. Is SiO2 most likely a molecular, metallic, ionic, or covalent-network solid?
Video transcript
Shown here are cartoons of two different polymers. Which one would have the higher melting point?
The accompanying image shows photoluminescence from four different samples of CdTe nanocrystals, each embedded in a polymer matrix. The photoluminescence occurs because the samples are being irradiated by a UV light source. The nanocrystals in each vial have different average sizes. The sizes are 4.0, 3.5, 3.2, and 2.8 nm. (a) Which vial contains the 4.0-nm nanocrystals?
Silicon is the fundamental component of integrated circuits. Si has the same structure as diamond. (a) Is Si a molecular, metallic, ionic, or covalent-network solid?
What kinds of attractive forces exist between particles (atoms, molecules, or ions) in (a) molecular crystals?
What kinds of attractive forces exist between particles (atoms, molecules, or ions) in (d) and metallic crystals?
Which type (or types) of crystalline solid is characterized by each of the following? (a) High mobility of electrons throughout the solid;