1. What was Crooke's contribution to the science of atomic structure? 2. Which is heaviest: a neutron, a proton, or an electron? 3. An atom is emitting light, what are it's electrons doing?
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1. He came up with the idea of weighing an atom in a vacuum.
Crookes also did some work with "Cathode Rays"
He also isolated several elements for the first time, Thallium and Protactinium, for example.
2. Neutrons and protons are pretty much equal in weight, the neutron is an extremely tiny amount heavier. It's really a negligible amount. Electrons are the lightest.
Mass of proton : 1,6726 x 10^(-27) kg
Mass of neutron: 1,6749 x 10^(-27) kg
Mass of electron: 0,00091x10^(-27) kg
3. The excited electrons are going down in energy levels back to their unexcited states.
Crookes also did some work with "Cathode Rays"
He also isolated several elements for the first time, Thallium and Protactinium, for example.
2. Neutrons and protons are pretty much equal in weight, the neutron is an extremely tiny amount heavier. It's really a negligible amount. Electrons are the lightest.
Mass of proton : 1,6726 x 10^(-27) kg
Mass of neutron: 1,6749 x 10^(-27) kg
Mass of electron: 0,00091x10^(-27) kg
3. The excited electrons are going down in energy levels back to their unexcited states.
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1.He studied the molecules and that's all he ever did
2.Protons are heaviest
3.The electrons inside a molecule have different energy levels. When incoming electromagnetic radiation (radio waves, x-rays, visible light, etc) is absorbed by these electrons, it excites them. In more technical terms the electrons go from a ground state to an excited state. Typically, for non-light emitting molecules, these electrons quickly drop back to ground state and transfer the energy to their surroundings as heat. However some organic molecules have structures that allows the electrons to stay excited a little longer, and in falling back to ground state then emit a photon of light of a lesser wavelength. So the light that is emitted has less energy than the light that was absorbed.
2.Protons are heaviest
3.The electrons inside a molecule have different energy levels. When incoming electromagnetic radiation (radio waves, x-rays, visible light, etc) is absorbed by these electrons, it excites them. In more technical terms the electrons go from a ground state to an excited state. Typically, for non-light emitting molecules, these electrons quickly drop back to ground state and transfer the energy to their surroundings as heat. However some organic molecules have structures that allows the electrons to stay excited a little longer, and in falling back to ground state then emit a photon of light of a lesser wavelength. So the light that is emitted has less energy than the light that was absorbed.
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I know how you feel