What type of extinguisher should you use for a fire involving a combustible liquid

What would you do if you told the guy you liked that you liked him

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.

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