Documents 1 Lecture 12: Radioactivity Questions –How and why do nuclei decay? –How do we use nuclear decay...

Slide 11 Lecture 12: Radioactivity Questions –How and why do nuclei decay? –How do we use nuclear decay to tell time? –What is the evidence for presence of now extinct…

Technology introduction-to-radioactivity

1.Atomic number = # of protons in nucleus THE PERIODIC TABLE# of nucleons = # of protons + # of neutrons OF ELEMENTSThe number of neutrons can vary slightly for a given element…