Using the periodic table entry below, match the phrases with their corresponding values. K
potassium

1. number of protons
2
2. atomic mass
39
3. number of electrons in the n = 1 shell
8
4. number of electrons in the n = 3 shell
20
5. number of neutrons
19

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Aspecimen of oil having an initial volume of 580cm^3 is subjected to a pressure increase of 4.0 mpa, and the volume is found to decrease by 0.40 cm^3. (a) what is the bulk modulus of the material? (b) what is the compressibility of the material?

In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.