In a chemical equation, the sum of the masses
of the products is less than the reactants
of the products is more than the reactants
of the products is equal to the reactants
of the products is not equal to the reactants
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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".

a electronegativity decreases beacuse the size of nucleus is bigger.