22.Niehls Bohr, proposed that electrons must have enough energy to keep them in constant circular motion, which enables them to
a. overcome the attraction of the negative nucleus of an atom.
b. overcome the repulsion of the positive nucleus of an atom.
c. overcome the attraction of the positive nucleus of an atom.
d. overcome the repulsion of the negative nucleus of an atom.
Answers: 2
Chemistry, 21.06.2019 17:00
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Adrop of acetone (nail polish remover) has a mass of 35 mg and a density of 0.788 g/cm3. what is its volume in cubic centimeters?
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What do electromagnetic waves carry? how are they produced through which media can they move? where do they transfer energy? what do they not transfer? what do mechanical waves carry? how are they produced? through which media can they move? where do they transfer energy? what do they not transfer?
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Chemistry, 23.06.2019 10:00
An uncovered pot of water lies out in the sun. which statements correctly describe what happens at the surface of the liquid water? 1. the vapor pressure remains constant regardless of the water temperature. 2. the vapor pressure is produced by water molecules that have evaporated. 3. the vapor pressure increases as the sun heats the water in the pot. 4. evaporation stops once the vapor pressure reaches a certain point. 5. evaporation and condensation both occur on the liquid’s surface.
Answers: 3
22.Niehls Bohr, proposed that electrons must have enough energy to keep them in constant circular mo...
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