Answer:
True
Explanation:
Sound waves traveling through air are indeed longitudinal waves with compressions and rarefactions. As sound passes through air (or any fluid medium), the particles of air do not vibrate in a transverse manner.
Hi! Are you looking for molarity?
Answer:
Energy levels 4-7
Explanation:
The energy levels in an atom are shown by the principal quantum number (n). Typically, the d orbitals begins to occur from the third energy level through the seventh energy level.
Most second and third row d-block elements are found between energy level n=4 and energy level n= 7 in the periodic table. Hence the answer