Which property of substance is not altered by a physical change?

Extensive Properties: A physical property that will change if the amount of matter changes. Change in which the matter's physical appearance is altered, but composition remains unchanged...

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".

i wish i could but this one is weird give me abc and i can solve it.