Lumped Element:

1.The physical size of the element is negligibly small when compared to the wavelength  of the electromagnetic wave propagation.

2. physically separable elements are termed as lumped elements.

3. Concept of circuit theory or network theory is based on lumped element.

4. We can convert RLC lumped network into LC network. (Lumping means concentrating or bringing between two points)

 
Ex: Resistors, Capacitors, Inductors etc.

Distributed Element:

1.The physical size of the element is comparable to the wavelength of the electromagnetic wave propagation.

2.If parameters are distributed among the line then it is termed as distributed elements.

3.Concept of field theory is based on distributed elements.

4. We cannot convert a distributed RLC network into LC network.

Ex: Transmission Line, EMFT(electromagnetic field theory)

KCL and KVL are applicable only when the elements are lumped. Its not applicable in distributed elements.