Francium is a naturally occurring radioactive element. at any moment there is probably no more than an ounce of francium on earth. francium's chemical properties are most similar to those of which of the following elements? uranium radium rubidium barium

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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".