Which of the following statements best describes a covalently bonded material? a. it is a conductor. b. it is an insulator. c. it readily allows electricity to flow. d. it contains delocalized electrons.

It is an insulator because it doesn't conduct electricty.

Option (B) is the correct answer.

Explanation:

A conductor is defined as a substance that allows flow of electrons through it due to which there will be flow of electric current.

Whereas an insulator is defined as a substance through which there will be very less or no flow of electrons. As a result, there will be no flow of electric current through it.

Also, when a material is covalently bonded then it means sharing of electrons has taken place between its atoms. And, covalent materials do not allow flow of electric current through it because of no presence of free electrons or ions.

Thus, we can conclude that the statement it is an insulator best describes a covalently bonded material.

vapour or gas assuming atmospheriv pressure

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia