The following pictures show the electron population of the bands of MO energy levels for four different materials.
-Which of these materials is a metal?
A)material (1)
B)material (2)
C)material (3)
D)material (4)

Question

The following pictures show the electron population of the bands of MO energy levels for four different materials. 
-Which of these materials is a metal?
A)material (1) 
B)material (2) 
C)material (3) 
D)material (4)

Quizplus · Accepted Answer

Material (1) is indicated as a metal, which is a class of elements characterized by their ability to conduct electricity and heat, along with malleability and ductility.

The Following Pictures Show the Electron Population of the Bands