Sayid listed some characteristics of waves in a chart. part of his chart is shown. (scroll down)    which of these would correct sayid's error? a.  change the heading of the chart to “mechanical.” b. replace “travel in straight lines” with “move in curved paths.”c. add “move due to particles bumping into each other” to the chart. d. change “move only through matter” to “move through space and matter.”

The reaction q+r2=r2q is found to be first order in r2 and

6. what does the symbol ah stand for? o one calorie given off by a reaction the specific heat of a substance the heat capacity of a substance the heat of reaction for a chemical reaction

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