There is a single pair of nonbonding electrons on the central atom in the Lewis structure of ICl 5 . Iron crystallizes in a structure in which the coordination number is 8.
Titanium carbide is a high melting, chemically inert compound that is almost as hard as diamond.
The crystal structure can be described as a closely-packed array of carbon atoms with titanium atoms in all of the octahedral holes. Calcium titanate crystallizes in a cubic unit cell with titanium atoms at the corners of the cell, oxygen atoms in the middle of the edges of the cell, and a calcium atom in the center of the cell. Iron crystallizes in a one of the cubic unit cells with a cell edge of 0.2866 nm. Calculate the number of atoms per unit cell.