There is a graduation of the properties of the elements in the modern periodic table and there is a relation between these properties and the electronic configuration of elements, The graduation of some properties...
Atoms combine with each other forming molecules through chemical bonds, Ionic bond produces compounds molecules only and doesn’t produce elements molecules because the ionic bond arises between two different atoms, The covalent bond produces...
The number of well-known elements up till now is 118 elements, These elements can be classified according to their properties and electronic structure into metals, nonmetals and noble (inert) gases, In the 19th century,...
The reactions of ionic compounds are faster than that of covalent compounds because the ionic compounds are composed mainly of positive & negative ions which are easy to react while the covalent compounds bonds...
