Water #1 Report Form

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Question 1. (1 point) Two isotopes of hydrogen are 11H and deuterium,21H. How many protons and neutrons are there in an atom of each isotope?

Question 2. (1 point) Which ice cube is made of deuterium oxide? Explain why you think so.

Question 3. (1 point) The size of an atom or molecule is primarily determined by its nuclear charge and number of electrons. Why do hydrogen, 11H, and deuterium, 21H, have roughly the sam e atomic size?

Question 4a. (0.5 point) What does the Water and Ice video tell about the relative densities of solid and liquid water?

Question 4b. (0.5 point) A container is completely filled with cold liquid water. It then is closed and cooled below zero degrees Celsius. What will happen?

Question 5. (1 point) Thinking about what you have seen in Question 4, why do pavements sometimes crack in the winter, especially in colder climates?

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