![]() ![]() Initially, there was no theoretical explanation for the Periodic Law, and it was only used as an empirical principle however, with the development of quantum mechanics, it became possible to understand the theoretical basis for the Periodic Law. Major periodic trends include electronegativity, ionization energy, electron affinity, atomic radii, ionic radius, metallic character, and chemical reactivity. Lothar Meyer presented his table following Mendeleev, but he disagreed with Mendeleev’s Periodic law. ![]() Henry Moseley discovered in 1913 that periodicity is determined by the atomic number rather than the atomic weight. The periodic trends tell you in which direction of the periodic table do you have increasing values for different chemical properties. Mendeleev also proposed an elemental periodic system based not only on atomic weights but also on the chemical and physical properties of the elements and their compounds. Mendeleev discovered this principle in 1871, following a number of investigations throughout the nineteenth century. Periodic trends (such as electronegativity, electron affinity, atomic and ionic radii, and ionization energy) can be understood in terms of Coulombs law, which is F (qq)/r². ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys.GATE CS Original Papers and Official Keys.DevOps Engineering - Planning to Production.Python Backend Development with Django(Live).Android App Development with Kotlin(Live).Full Stack Development with React & Node JS(Live).Java Programming - Beginner to Advanced.Data Structure & Algorithm-Self Paced(C++/JAVA).Data Structures & Algorithms in JavaScript.A comparison of the relative covalent radii of atoms is shown. Data Structure & Algorithm Classes (Live) Moving left to right across the periodic table the. ![]()
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