A student has 4 cards representing elements. The cards were dropped and you have to figure out which ones are the same element. Writing Task:
•What determines the identity of an element
•How the elements are arranged on the periodic table
•Which of the 4 cards represent the same element and how do you know?

Each of the following reactions is allowed to come to equilibrium and then the volume is changed as indicated. predict the effect (shift right, shift left, or no effect) of the indicated volume change. drag the appropriate items to their respective bins.co(g) + h2o(g) < => co2(g) + h2(g) (volume is decreased) pcl3(g) + cl2(g) < => pcl5(g) (volume is increased) caco3(s)< => cao(s) + co2(g) (volume is increased)