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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
Electrons form a cloud around the nucleus, and spin on their axis'. Electrons â¦ in an atom move around the nucleus. Each electron moves in its own space a certain distance from the nucleus.he electrons are placed in an atom, around nucleus, on different electron shells. -- Electrons exist in a cloud around the nucleus.