Which volcanoes are located along colliding plate boundaries

How are elements arranged in a periodic table

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present