Use the periodic table to find the number of valence electrons for calcium (Ca) aluminum (Al) rubidium (Rb) oxygen (O) sulfur (S) and iodine (I). then use that information to predict the formula for each of the following compounds: Calcium oxide, aluminum iodide, rubidium sulfide, and aluminum oxide.

150.0 grams of asf3 were reacted with 180.0 g of ccl4 to produce ascl3 and ccl2f2. if the actual yield of ccl2f2 was 127 g, what is the percent yield?

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?