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Across a period, the atomic radius decreases from left to right. Because the outer electrons are present in the same valence shell during a period and the atomic number increases from left to right across a period, the...
The radius of an atom is known as its atomic radius. It is used to determine the size of an atom. If the element is a metal, the atomic radius is the metallic radius; if it is a nonmetal, the atomic radius is the coval...
The quantity of valence electrons affects the physical and chemical properties of elements. The number of valence electrons in a group of elements is the same. As a result, physical and chemical properties of elements...
In his periodic chart, Mendeleev organised the elements by atomic weight or mass. In order of increasing atomic weight, he divided the elements into periods and groups. He grouped elements that have comparable qualitie...
The primary idea of the periodic table's organisation is to organise elements into periods and groups based on their qualities. This arrangement simplifies and organises the study of elements and their compounds. Elem...
Significant figures are those digits that have meaning and are recognized to be assured of their value.They are used to show uncertainty in an experiment or a computed number. For example, if 18.2 mL is the result of a...
It is possible to express the balanced response of carbon combustion as follows: C+ O2 = C02Carbon dioxide is produced when one mole of carbon is burned in one mole of dioxygen (air) using the balancing equation.ii) 1...
It is not much spoken about the quantization of orbits of planets around the Sun since the angular momentum associated with planetary motion is largely relative to the value of constant h. The angular momentum of the E...
· When the electrons revolve round the nucleus, they are continuously accelerated towards the centre of the nucleus. According to Lorentz, an accelerated charged particle should radiate energy continuously. There...
On the basis of the results of α-scattering experiment, Rutherford suggested the following picture of the atom: · Atom may be regarded as a sphere of diameter 10–10 m but whole of the positive charge and almost...
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