Which of the following statements is untrue in regard to sound traveling in air?
a. during a single vibration of the diaphragm, molecules in the air near it will also complete one vibration.
b. the area covered by the wave front increases as the wave advances, but the energy passing through a wave front in a unit of time decreases.
c. sound waves in the air are transverse and consist of compressions and rarefactions of air molecules.
d. as the distance from the earth increases, the sound wave intensity also decreases due to the lessening density.

Drag each item into the proper state of matter category.

Wave functions describe orbitals in a hydrogen atom. each function is characterized by 3 quantum numbers: n, l, and ml. if the value of n = 2: the quantum number l can have values from to . the total number of orbitals possible at the n = 2 energy level is .

4. now look at the green lines you created by connecting the three boiling point data points and the three melting point data points. for each of these lines, describe any trends you see. 5. locate the elements on your periodic table that you circled in green on your graph. what term or description would you use to identify these elements with respect to the periodic table? 7. using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers.