The metalloids and the difference between the positive ion and the negative ion
The metalloids are semi-metallic elements which have the properties of both the metals and the nonmetals , It is difficult to know the metalloids from their outermost electrons due to the difference of the numbers of the electrons in their valencies shells .
The positive ion
The positive ion ( the cation ) is the atom of a metallic element that loses one electron or more during the chemical reactions , The positive ion carries positive charges equal to the number of the lost electrons .
The number of the energy levels in the positive ion is less than the number of the energy levels in its atom .
The negative ion
The negative ion ( the anion ) is an atom of a nonmetallic element that gains one electron or more during the chemical reactions , The number of the electrons of the negative ion is more than that of its protons .
The negative ion carries the negative charges equal to the number of the gained electrons .
You notice that the number of the energy levels in the negative ion is equal to the number of the energy levels in its atom .
The electronic structure of the negative ion is similar to that of the nearest inert gas that follows .