Chemistry

Find free online Chemistry Topics covering a broad range of concepts from research institutes around the world. Nomenclature of Elements with Atomic Number Greater than 100 Usually, when a new element is discovered, the discoverer suggests a name following IUPAC guidelines which will be approved after a public opinion. In the meantime, the new element will be called by a … [Read more...] about Nomenclature of Elements with Atomic Number Greater than 100

Find free online Chemistry Topics covering a broad range of concepts from research institutes around the world. Moseley's Work and Modern Periodic Law In 1913, Henry Moseley studied the characteristic X-rays spectra of several elements by bombarding them with high energy electrons and observed a linear correlation between atomic number and the frequency of X-rays emitted … [Read more...] about Moseley’s Work and Modern Periodic Law

Find free online Chemistry Topics covering a broad range of concepts from research institutes around the world. Classification of Elements During the 19th century, scientists have isolated several elements and the list of known elements increased. Currently, we have 118 known elements. Out of 118 elements, 92 elements with atomic numbers 1 to 92 are found in nature. … [Read more...] about Classification of Elements

Find free online Chemistry Topics covering a broad range of concepts from research institutes around the world. Filling of Orbitals In an atom, the electrons are filled in various orbitals according to aufbau principle, Pauli exclusion principle and Hund's rule. These rules are described below. Aufbau Principle: The word Aufbau in German means 'building up'. In the … [Read more...] about Filling of Orbitals

Find free online Chemistry Topics covering a broad range of concepts from research institutes around the world. Quantum Numbers The electron in an atom can be characterised by a set of four quantum numbers, namely principal quantum number (n), azimuthal quantum number (l), magnetic quantum number (m) and spin quantum number (s). When Schrodinger equation is solved for a wave … [Read more...] about Quantum Numbers