Question

What is a reason of weak periodic potential of positive ion core?​

Answer 1

Answer:

Ions are atoms with extra electrons or missing electrons. When you are missing an electron or two, you have a positive charge. When you have an extra electron or two, you have a negative charge.

Ion, any atom or group of atoms that bears one or more positive or negative electrical charges. Positively charged ions are called cations; negatively charged ions, anions. The reason is given by the fact that the electronic shells are ... As a next step, we place the electrons in a periodic potential of the ion cores and see the formation of energy bands, band gaps, effective masses, etc.