Question

Define :

i) Modern Periodic Law
ii) Periodicity​

Answer 1

Answer:

i) ${\boxed{\boxed{\green{Modern\:periodic\:law:}}}}$ The modern periodic law states that the physical and chemical properties of elements are the periodic function of their atomic number.

ii) ${\boxed{\boxed{\blue{Periodicity:}}}}$ Periodicity is the occurrence of certain properties (physical and chemical properties) after regular intervals or in which there is gradual variation.

Hope this helps you.

Answer 2

Answer:

i) Modern Periodic Law- "The modern periodic law states that the physical and chemical properties of the elements are the periodic function of the atomic numbers."

ii) Periodicity- "Periodicity refers to trends or recurring variations in element properties(both physical and chemical) with increasing atomic number. Periodicity is caused by regular and predictable variations in element atomic structure".