The Solid State — Chemistry STD 12 Science — Question

The smallest repeating unit in space lattice which when repeated over and again results in the crystal of the given substance is called unit cell.
The collection of all points in the crystal having similar environment is called space lattice.
The lattice points can be arranged in maximum of fourteen types. This arrangement is called Bravais lattice.
Two or more substances having the same crystal structure are said to be isomorphous.