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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
The electron cloud model uses the concept of 'orbitals', referring to regions in the extra-nuclear space of an atom where electrons are likely to be found. An orbital is a mathematical function that describes the wave-like behavior of electrons in an atom.