1) The fundamental quantum number explains a) the orbit's size b) the orbital's form c) rotating orbital d) orientation of the orbital 2) The number of protons and neutrons in an atom collectively is referred to as the a) mass number b) atomic number c) weight number d) proton number 3) He first proposed the concept of the negatively charged "electron" particle. a) Ernest Rutherford b) John Dalton c) J.J Thomson d) Erwin Schrödinger 4) He believes that all matter is composed of indivisible atoms. a) John Dalton b) Niels Bohr c) J.J Thomson d) Erwin Schrödinger 5) What do the plums in the atomic model known as the "plum pudding" model represent? a) nucleus b) protons c) neutrons d) electrons 6) The protons and neutrons that make up a nucleus were initially depicted in this model. The nucleus is surrounded by electrons, but their different energy levels are not visible. a) The "Plum Pudding Model" of the atom b) The "Rutherford Model" of the atom c) The "Quantum Mechanical Modell" of the atom d) Democritus's model of the atom 7) What subatomic particle or particles are found in an atom's nucleus? a) electron and proton b) proton and neutron c) electron and neutron d) proton only 8) The proton and neutron count in an atom is known as the___ a) mass number b) atomic number c) atomic mass d) atomic weight 9) He said that we cannot know both the position and speed of a particle, such as a photon or electron, with perfect accuracy a) Ernest Rutherford b) Edwin Schrodinger c) Werner Heisenberg d) Niels Bohr 10) He is known for the planetary model of the atom a) Niels Bohr b) Neils Bohr c) Niels Borh d) Neils Borh

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