What is periodicity in properties of elements with reference to the Modern Periodic Table? Why do all the elements of the same group have similar properties? How does the tendency of elements to gain electrons change as we move from left to right in a period? State the reason of this change?

Properties that reappear at regular intervals or in which there is gradual variation at regular intervals are called periodic properties, and the phenomenon is known as the periodicity of elements.
Elements in the same group or column have the same number of electrons in their outermost shell. Hence, elements of the same group have similar properties.
On moving across a period from left to right, the tendency to gain electrons increases due to an increase in the nuclear pull and a decrease in atomic size.


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Updated on: 10-Oct-2022


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