Aunique identifier of a chemical element determined by how many protons are found in the nucleus of an atom

- Atomic number

Explanations:- In periodic table, elements are arranged on the basis of their atomic number and atomic number of an element equals to the number of protons present in the nucleus of the atom. All elements have different number of protons.

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".