Explain how to place your electrons in 3 full sentences using all three
electron placement rules.

The rules of engagement (roe) working group is often used to (select all that apply.)

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

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.