Which of the following is an example of an extensive property? * the sample weighs 65.23 grams
the sample has a blue color
the density of the sample is 3.45 g/mL
the temperature of the sample is 25 'C
the sample has no odor

What elements have 2 electrons inthe 4s sublevel

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

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.