In order for the reaction Al + HCI -> AICI3 + H2 to occur, which of the following must be true:

a. Al must be above H on the activity series

b. Al must be above Cl on the activity series

c. None of these

d. Heat must be supplied to the reaction

e. AlCl3 must be a precipitate

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

What overall charge must all compounds have

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