Based on the data in the table, what can we reasonably conclude about the speed of sound through various materials?
The speed of sound is faster in lighter materials,
The speed of sound is higher in liquids than in solids.
The speed of sound is higher in solids than in liquids.
The speed of sound moves slower when atoms are closely packed.

Compare and contrast physical changes with chemical changes.

The number at the end of an isotope’s name is the number.

Which of the following statements is true about energy quantization at the atomic level? electrons in the outermost orbits are the most stable. electrons in all the orbits around the nucleus have the same amount of energy. electrons in the orbit closest to the nucleus have the least amount of energy. electrons absorb or release the same amount of energy independent of the energy levels.