You are on an archeological dig with a research team from the local university. the team unearths some pieces of an ancient wooden boat. when a sample of the wood is analyzed for carbon-14, scientists determine that 12.5% (or1/8) of the original amount of c-14 remains. if the half-life of c-14 is 5,730 years, how old is the wood from the boat?

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