16. Common isotopes, which are atoms of your element with different number of neutrons. Write down at least 2-3 examples 3pts
17. Source of element is it mined, obtained from the ocean, air, etc..) 4pts
18. Draw and label or cut and paste a picture of your atom containing its protons, neutrons, and electron
configuration somewhere on your project 10pts
19. Practical uses of the element by man 4pts
20. A common reaction of your element when it chemically reacts with another element either in nature
or in a laborator

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. 8. when a 2.5 mol of sugar (c12h22o11) are added to a certain amount of water the boiling point is raised by 1 celsius degree. if 2.5 mol of aluminum nitrate is added to the same amount of water, by how much will the boiling point be changed? show all calculations leading to your answer or use 3 – 4 sentences to explain your answer. 9. if 5.40 kcal of heat is added to 1.00 kg of water at 100⁰c, how much steam at 100⁰c is produced? show all calculations leading to an answer. 10. the freezing of water at 0⁰c can be represented as follows: h2o (l) ↔ h2o(s) the density of liquid water is 1.00 g/cm3. the density of ice is 0.92 g/cm3. in 3 – 4 sentences explain why applying pressure causes ice to melt.