Question

what is metallic substance?​

Answer 1

Answer:

In chemistry, a metal is an element that readily forms positive ions (cations) and has metallic bonds. ... A modern definition of metals is that they have overlapping conduction bands and valence bands in their electronic structure.

Explanation:

Answer 2

Answer:

• The utility of positron annihilation studies of metallic substances relies on the fact that the characteristics of the annihilation process depend almost entirely on the initial state of the positron–many-electron system.
• Since energetic positrons are rapidly thermalized after entering condensed matter, if the positrons are not bound to electrons, the characteristics of the annihilation process in most cases depend almost entirely on the initial state of the many-electron system where positrons annihilate.
• The substance which exhibits the property of Metals known as Metallic substances.