Solve the following problem, show all you work. Circle or underline your final answer. 1.Analysis of 20.0g of a compound containing only calcium and bromine indicates that 4.00 g of calcium are present. What is the empirical formula?

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Surface currents are caused by blank space . question 14 options: surface currents are caused by? differences in water temperature high salinity differences in density wind forces

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17