4 pts An astronaut detected the presence of isotope 140 X on Planet Krypton. An atom of this isotope has protons, neutro
Posted: Sun May 22, 2022 10:31 pm
4 pts An astronaut detected the presence of isotope 140 X on Planet Krypton. An atom of this isotope has protons, neutrons, and electrons. The element symbol for this atom is