. Which of the following is/are the characteristics of crystal lattice?
(a)Each point in a lattice is called lattice point or lattice site.
(b)Each point in a crystal lattice represents one constituent particle which may be an atom, a molecule (group of atoms) or an ion.
(c)Lattice points are joined by straight lines to bring out the geometry of the lattice.
(d)All of these.
A regular three dimensional arrangement of points in space is called a crystal lattice. It has all the characteristics mentioned in (a), (b) and (c).