Start studying components of gastric juice. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
How many protons neutrons and electrons in uranium 240? Uranium 240 has 92 protons and electrons, but 148 neutrons because the atomic number is 92 and the atomic mass is 240. Edit
When Uranium, atomic number 92, loses a proton, it is no longer uranium. It is Protactinium, atomic number 91. When it loses another proton, it becomes thorium, Atomic number 90. As the big, unstable atoms decay into smaller atoms, they shoot off high speed particles of various kinds, plus radioactive energy. The process of decay proceeds step by step at a definite rate. After 4.5 billion years, half a supply of radioactive uranium has decayed into a type of lead, whose atomic number is 82.