Question

The melting point of a material with low binding energy is:
A.High
B.Low
C.Infinity
D.negative

Answer 1

Hint: When the binding energy is low, then the attraction between the valence electron and the nucleus is also low. So, this means that the intermolecular attraction is low. Hence, the melting point is low.

Complete step by step answer:
Binding energy is the smallest amount of energy required to separate a particle from a system of particles or to disassemble a system of particles into individual parts which are bound by electromagnetic or nuclear forces. The product of mass defect and the square of speed of light gives the binding energy.
As the size of the element increases, the binding energy of the element decreases i.e. binding energy of the element is inversely proportional to the size. Similarly, the melting point of the element decreases down the group as the size of the element increases. The melting point of the material will experience less suppression So, if the binding energy of the material is low, so will be the melting point of the element.
Melting point depends on the intermolecular forces. The stronger these forces, the higher is the melting point.
The melting point of a material with low binding energy is low.
Therefore, the correct answer is option (B).

Note: Nuclear binding energy is the energy which is needed to separate an atomic nucleus completely into its constituent protons and neutrons. In comparison to chemical bond energies, the nuclear binding energies are greater. The nuclear binding energy is used to determine whether fission or fusion will be a favorable process.