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.

Calcium (Ca) => 2

Aluminium (Al) => 3

Rubidium (Rb) => 2

Oxygen (O) => 2

Sulphur (S) => 2

Iodine (I) => 1

Formulae

Calcium oxide : CaO

Aluminium iodide : AlI3

Rubidium sulphide : RbS

Aluminium oxide : Al2O3

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error