How much energy in joules will be required to raise the temperature of 50.0 g of water from 20 degrees C to 60 degree C

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

Complete each row of the table below by filling in the missing prefix or missing exponent.

The equation picture below shows which type of nuclear reaction u 235 + n x e 134 + sr 100 + 2n