based on what you've observed summarize the relationship between how protons, neutrons, and electrons affect the overall change of an atom

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.

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

Fossil fuels are organic compounds that are made from