Iron reacts with sulfuric acid to form iron (II) sulfate and hydrogen gas.

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.

What is avogadro’s number, and why is it useful

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?