Which of the following pairs of elements is most likely to form an ionic compound? magnesium and fluorine, nitrogen and sulfur, oxygen and chlorine, sodium and aluminium

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.