RADIOACTIVITY AND NUCLEAR REACTIONS Chapter 18 The Nucleus Protons and neutrons are packed tightly in the nucleus, where you find the majority of the atomâs mass. The Strong…
Periodic Trends Introduction to ions Atoms are electrically neutral because they have equal numbers of protons and electrons When an electron is either gained or lost by…
The Atomic Nucleus Discovery of Radioactivity Lead block Radium Lead block Radium Lead block Magnet a Alpha particle (helium nucleus) a Beta particle (electron) …