Whats the chemical formula for octahydrate? please explain how you got your answer <3

Elements that do not have full outer electron shells will donate, share, or take electrons from other atoms. choose the items that have the correct binary ionic formula.

Astudent is asked to identify and element that is pale yellow brittle solid and does not conduct electricity. at which location in this periodic table would the element most likely be found?

Which nuclide is most likely to be radioactive and synthetic 24/12 mg237/93mg195/78mg230/84mg