I’m gonna give answers that I’m only 100% sure of, and maybe suggest answers too
9. Neutrons 10. Protons and Neutrons 12. Atomic Mass / Mass Number 13. Little Boy over Hiroshima, Japan. 14. Spontaneous fission 15. Alpha decay 17. Marie Curie 19. Nuclear fission 20. Gamma rays 21. Atomic number
I’d probably know more of these if I paid attention more in my lessons/studies IMO, but here’s what I know 100% for those answers!
