The element key for nitrogen is shown below. n

From this key, determine the atomic mass of nitrogen.

Group of answer choices

14.01

7

21.01

7.01

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.