Which is true of an element? a
It is the purest substance
b
It has different kinds of atoms
c
It is a mixture
d
The atoms always exist as single atoms

b it has different kinds of atoms

it has different kind of atom

Explanation:

i think

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".