Arsenic has one stable isotope:75/33 As. How many neutrons and protons are in a stable arsenic atom?

A. 33 neutrons and 42 protons B. 33 neutrons and 75 protons

C. 42 neutrons and 33 protons

D. 75 neutrons and 33 protons

Which of these best describes an ionic bond?

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole

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.