How would you prepare a 0.1m solution of hcl starting with a 1.0m solution? assume you want to prepare 100 ml of solution.

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

Using the periodic table, complete the table to describe each atom. type in your answers

Which of these conditions most likely produces an unstable isotope?