How would the freezing point of seawater compare with that of pure water

Amount of liquid measured in l or lm

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

1) this is the structure in the cell nucleus that houses a cell's genetic information