I have lived 2 centuries. How many minutes have I been alive? (use scientific notation pls)

Scientist wants to react a barium chloride salt with an acid. to speed up the reaction, the scientist crushes the barium chloride salt until it is a fine powder. this speeds up the reaction by a. increasing the ph of the salt. b. increasing the surface area of the salt. c. increasing the pressure of the salt. d. increasing the temperature of the salt. im thinking more a not 100% sure

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

Need on both questionswill markbr />