1. if you have a periodic table that is not color coded, describe where to look on the periodic table to find elements which have similar chemical properties. 2. explain why they have similar chemical properties then name three elements that have those similarities.

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.