Discuss the quantum states of sodium crystal having N atoms.

Sodium (atomic mass = 23) forms face-centred cubic crystal. What is the density of sodium crystal if the radius of sodium atom is 1.91Å?

What are ionic crystals ? Discuss the crystal structure of sodium chloride.

For crystal sodium chloride, state (i) the type of lattice in which it crystallises. (ii) co-ordination number of each sodium ion and chloride ion in the crystal lattice. (iii) number of sodium and chloride ions present in a unit cell of sodium chloride. (iv) the structural arrangement of sodium chloride crystals.

For crystal sodium chloride, state (i) the type of lattice in which it crystallises. (ii) co-ordination number of each sodium ion and chloride ion in the crystal lattice. (iii) number of sodium and chloride ions present in a unit cell of sodium chloride. (iv) the structural arrangement of sodium chloride crystals.

For crystal sodium chloride, state (i) the type of lattice in which it crystallises. (ii) co-ordination number of each sodium ion and chloride ion in the crystal lattice. (iii) number of sodium and chloride ions present in a unit cell of sodium chloride. (iv) the structural arrangement of sodium chloride crystals.

Atomic number of sodium is 11. Write down the four quantum numbers of the electron having highest energy.

A hydrogen atom, initially at rest in the n = 3 quantum state, undergoes a transition to the ground state, emitting a photon in the process. What is the speed of the recoiling hydrogen atom?