In the covalent bond there is an electron compartment, while in the ionic bond there is an electron transfer. The ionic bond occurs between two different atoms (metallic and non-metallic), while the covalent bond occurs between two equal (non-metallic) atoms. Key differences between Ionic Covalent Bond.Genesis of Periodic Classification Dobereiner’s Triads In 1829, Dobereiner arranged certain elements with similar properties in groups of three in such a way that the atomic mass of the middle element was nearly the same as the average atomic masses of.Classification of Elements and Periodicity in Properties Class 11 Notes Chemistry Chapter 3.
