What is the pH of 0.0030 M NaOH

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.

The continuous release of nuclear energy caused when one fission reaction triggered more nuclear reactions is a

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?