CHEMISTRY NO LINKS PLEASE! What is [OH-] in an aqueous solution at 298 K in which [H+] = 5.4010-3M?

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize