An atom of an element contains 9 protons. Which element is it?

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.

Who discovered a pattern to the elements in 1869?

Five different substances are given to you to be dissolved in water. which substances are most likely to undergo dissolution in water? check all that apply. view available hint(s) check all that apply. sodium fluoride, naf octane, c8h18 propanol, ch3ch2ch2oh potassium iodide, ki benzene, c6h6