Which among the following statements is correct?

The total number of atoms in one unit cell of face-centered unit cubic cell is __ atoms.

The unit cell with a≠b≠c and α=γ=90, β≠90 refers to ______crystal system.

Which type of solid structure melts at a definite, sharp melting point?

The radius of an atom of an element is 55 pm. What is the edge length of the unit cell if it is body-centred cubic?

Which of the following are responsible for high electrical and thermal conductivity of a metal?

For a metallic crystal, which band do the delocalized electrons occupy?

Which of the following is a characteristic of amorphous solid?