A student is performing experiments on a particular substance. Which statement is an observation of a chemical property of the substance?
A. It boils.
B. Electricity passes through it.
C. Its viscosity decreases.
D. It reacts with acid

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

What happens when the temperature of a solution increases?

Which statement can best be concluded from the ideal gas law?