Ionic Compound Example:
For example, you are familiar with the fairly benign unspectacular
behavior of common white crystalline table salt (NaCl). Salt
consists of positive sodium ions (Na+) and negative
chloride ions (Cl-). On the other hand the element
sodium is a silvery gray metal composed of neutral atoms which
react vigorously with water or air. Chlorine as an element is
a neutral greenish-yellow, poisonous, diatomic gas (Cl2).
The main principle to remember is that ions are completely
different in physical and chemical properties from the neutral
atoms of the element .
The notation of the + and - charges on ions is very important
as it conveys a definite meaning. Whereas elements are neutral
in charge, IONS have either a positive or negative charge depending
upon whether there is an excess of protons (positive ion) or
excess of electrons (negative ion).
Formation of Positive Ions.
Formation of Negative Ions.