What is the 11th element in period 4?

plz don't send me another tiny link

Why is permeable soil best for plants that need a lot of drainage?

One way that radioactive waste is treated is by burying it in repositories. the repositories are found only in states with very low populations. true or false? a. trueb. false(also i meant to put high school but it put down middle school instead)

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.