Strontium phosphate, sr3(po4)2, is a crystalline substance used in medicine and industry. how many phosphorus atoms are represented in the formula for sr3(po4)2? a) 2b) 3c) 4d) 8

Which atom or ion is the largest? 0 a. 0 0 0 0 e. li

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

Type the letter that represents the correct location for each particle type below.