Classify each of the following chemical reactions.

What is the name of this hydrocarbon?

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.

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!