Reactivity of Metals and Non-metals (single replacement)

Reactivity of Elements

All elements in nature are reactive chemically, except the Noble metals and the Noble gases. This is due to the fact that the electronic configurations of the atoms of all elements are not stable. A stable electronic configuration is one which follows the octet or the duplet (in Hydrogen and Helium) rule.

The elements' atoms either gain, lose or share electrons with the atoms of other elements in order to satisfy their valencies, that is, the number of electrons they need to lose, gain or share in order to complete their respective octets. Whether an atom loses, gains or shares electrons depends on the number of valence electrons, the atomic radius, the ionization energy, and other such characteristics of atoms. The intensity with which the atom will undergo chemical changes is also governed by these factors. The ability to take part in chemical reactions is called the reactivity of an element. The more its chemical reactivity, the more is its nature to undergo chemical changes and form a variety of compounds.

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