Hello Aanvi, that's an interesting question, many people still have confusion. Glad you asked that.

1. Resistance: Resistance is a fundamental property of a material or component that determines its ability to impede the flow of electric current. It is denoted by the symbol "R" and measured in ohms (Ω). Resistance is dependent on factors such as the material's electrical conductivity, dimensions, and temperature. 

2. Resistor: A resistor is an electronic component specifically designed to introduce a specified amount of resistance into an electrical circuit. It is a passive device made from a material that exhibits a high degree of resistance. Resistors are commonly used in circuits to limit current flow, divide voltage, provide load resistance, control signal levels, and perform various other functions. They are typically constructed as small cylindrical or rectangular components with color-coded bands to indicate their resistance value and tolerance.

So basically Resitance is a property and Resistor is a small device/ component.