Atom - Atom - Orbits and energy levels: Unlike planets orbiting the Sun, electrons cannot be at any arbitrary distance from the nucleus; they can exist only in certain specific locations called allowed orbits. This property, first explained by Danish physicist Niels Bohr in 1913, is another result of quantum mechanics—specifically, the requirement that the angular momentum of an electron in ... Questions on Bohr Model of Hydrogen Atom Questions based on the Bohr model of hydrogen atom are inevitable in any Medical But atoms of high atomic number are required for the production of X-rays since questions (with solution) at physicsplus: Questions on Bohr Atom Model Updates: 1 Peter Woit's Not Even Wrong has been published in
When a current is passed through a solution of salt water, sodium chloride decomposes according to the following reaction: 2NaCl + 2H2O → 2NaOH + Cl2 + H2. How many grams of chlorine gas, Cl2, are given off if 7.5 grams of sodium chloride, NaCl, are decomposed? The molecular mass of NaCl is 58.44 g/mole. The molecular mass of Cl2 is 70.90 g/mole.