¿What's the answer to this? (Element related)

the correct answer would be d. hope this !

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 think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

може ли да зареждате повече информация, моля