Introduction to Trends in Physical Properties There are many observable patterns in the physical and chemical properties of elements as we descend in a group or move across a period in the Periodic
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(a) Atomic Radius You can very well imagine that finding the size of an atom is a lot more complicated than measuring the radius of a ball. Do you know why? Firstly, because the size of a
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(b) Ionic Radius The removal of an electron from an atom results in the formation of a cation, whereas gain of an electron leads to an anion. The ionic radii can be estimated by measuring the dista
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ionization enthalpy A quantitative measure of the tendency of an element to lose electron is given by its Ionization Enthalpy.It represents the energy required to remove an electron from an isolate
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(d) Electron Gain Enthalpy When an electron is added to a neutral gaseous atom (X) to convert it into a negative ion, the enthalpy change accompanying the process is defined as the Electron Gain En
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Electronegativity A qualitative measure of the ability of an atom in a chemical compound to attract shared electrons to itself is called electronegativity. Unlike ionization enthalpy and electron
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