What is the region around the nucleus that is mostly empty space called?, Electron cloud, Sub-atomic space, Who proposed the atomic theory?, John Dalton, Isaac Newton, Albert Einstein, What is the smallest unit of matter?, Molecule, Atom, Cell, What charge does a proton have?, Neutral, Positive, Negative, What is found in the nucleus of an atom?, Electrons, Protons and neutrons, Ions, Who discovered the electron?, Niels Bohr, J.J. Thomson, Ernest Rutherford, What is the charge of an electron?, Positive, Negative, Neutral, What model did Rutherford propose?, Plum pudding, Nuclear, Bohr, What is the atomic number?, Number of neutrons, Number of protons, Number of electrons, What is the mass number? (atomic mass), Protons + electrons, Protons + neutrons, Neutrons + electrons, What did Bohr's model introduce?, Electron clouds, Electron orbits, Solid spheres.

Atomic Arcade

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