It reacts with a wide variety of materials to form fluorides in unusually high oxidation states. It is difficult, if not impossible, to explain the observed shapes of common molecules with the atomic orbitals that we use to explain the electronic configuration of an isolated atom. By combining these atomic orbitals, however, we can develop sets of hybrid atomic orbitals that are ideally suited for explaining the observed shapes of molecules. Draw the Lewis structure of NO 2 and then predict the hybridization of the nitrogen atom. Gallium arsenide is a light-sensitive compound used in photocells, which crystallizes in a cubic unit cell for which the cell edge is 0.5653 nm.
Metals become better conductors of electricity as the temperature is lowered.
For some metals, the conductivity increases until the metal becomes a superconductor at very low temperatures. 3.4 K. The unit cell of this crystal can be defined in terms of the coordinates of the carbon atoms. NaH crystallizes with a structure similar to NaCl. FCC unit cell. The empirical formula is Ga 4 As 4 .