if an atom changes its number of protons , it becomes a different atom
{"Image DocumentName": "If an atom changes its number of protons (its atomic number), it becomes a different atom.", "Image ImageDescription": "If U-238 emits an alpha particle \u2013 two protons and two neutrons \u2013 its atomic mass will decrease by 4, and it becomes Thorium, Th-234. U-238 has an atomic number of 92, Th-234 will have an atomic number of _________.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}