Which solution turns litmus paper blue a. acidic b. basic c. neutral d. none

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.

State one important difference between a physical change and a chemical change?