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,...
Elements are arranged in ascending order of their atomic number and according to their electronic configurations, the sequence of elements agrees with the Auf-bau principle, The long-form periodic table is classified into 4 blocks which...
Lanthanides and Actinides (Inner Transition Metals) are two unique series of elements located at the bottom of the modern periodic table. They possess remarkable chemical, physical, and electronic properties that make them essential in...
