What is the modern periodic table of elements? A. A chart organizing all elements by their atomic mass

B. A list of all elements occuring in nature

C. A chart organizing all elements by their atomic number

D. A list of all elements created by humans

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.