Al(OH)3 (s) + 3 HCl (aq) g AlCl3 (aq) + 3 H2O (l) If you start with 50.3 g of Al(OH)3 and you isolate 39.5 g of AlCl3, what is the percent yield?

Fluorine

Atomic number = 9

                               (two dots)

                  (two dots)    F   (two dots)

                                 (one dot)

Go to halogens (group 7) and period 2, you will find Fluorine.

- Hope that helped! I cannot tell exactly what the problem wants, so please let me know if you need more help.