Class 11 / Chemistry / Classification of Elements and Periodicity in Properties / Periodic Trends In Properties Of Elements

Introduction to Trends in Physical Properties

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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Class 11 / Chemistry / Classification of Elements and Periodicity in Properties / Periodic Trends In Properties Of Elements

Atomic Radius

(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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Class 11 / Chemistry / Classification of Elements and Periodicity in Properties / Periodic Trends In Properties Of Elements

Ionic Radius

(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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Class 11 / Chemistry / Classification of Elements and Periodicity in Properties / Periodic Trends In Properties Of Elements

Ionization Enthalpy

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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Class 11 / Chemistry / Classification of Elements and Periodicity in Properties / Periodic Trends In Properties Of Elements

Electron Gain Enthalpy

(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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Class 11 / Chemistry / Classification of Elements and Periodicity in Properties / Periodic Trends In Properties Of Elements

Electronegativity

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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