An element's atomic number is the
a. number of protons in an atom's nucleus.
b. mass of the atom.
c. weight of the atom.
d. sum of the protons and neutrons in an atom

Asap at one point in history people could measure temperature by looking at the volume of a sample of gas. suppose a sample in a gas thermometer has a volume of 135ml at 11.0°c. indicate what temperature would correspond to each of the following volumes: 113 ml, and 155 ml.