the water holding capacity of soil is least likely to be affectred by the addition of which of the floowing

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

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?

In which block of the periodic table is uranium (u) found? s blockd blockp blockf block