Physics

Physics, 02.07.2019 14:20, simegustachocolate

What is the minimum kinetic energy in electron volts that an electron must have to be able to ionize a hydrogen atom (that is, remove the electron from being bound to the proton)?

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Physics, 18.09.2019 01:20, dianaosorio33895

Calculate (a) the electric potential established by the nucleus of a hydrogen atom at the mean distance of the circulating electron , (b) the electric potential energy of the atom when the electron is at this radius, and ( c) the kinetic energy of the electron, assuming it to be moving in a circular orbit of this radius centered on the nucleus. (d) how much energy is required to ionize the hydrogen atom? express all energies in electron volts. ( e = 1.60217657 × 10-19 coulombs). note that the answer to (d) is very important and a good number to remember. it sets the scale of the energy of all chemical interactions. chemistry is just energy changes due to rearrangements of charges with a bit of quantum mechanics thrown in!

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Chemistry, 10.10.2019 05:00, dunk36

The nucleus of a particular atom as a diameter of 11.5 x10-15 m for an electron to be confined within this region, the de broglie wavelength for the electron would have to have to be smaller than this diameter. assuming that the de broglie wavelength was equal to the nucleus diameter, what would be the kinetic energy of the electron in kj/mol? reminder: to specify large values (e.g. a billion) use scientific notation like so: 1e9 note: required precision is 296. 10,409,100.000 question 2 3 pts now let's consider that an electron is confined within this diameter of an entire atom rather than the nucleus. assuming that the de broglie wavelength of the electron was equal to your atomic diameter, 0.31 nm, what would be the kinetic energy of the electron in kj/mol? for a sense of scale, consider that the carbon atoms have a diameter of 0.182 nm and the energy needed to extract an electron from such an atom (the lonization energy) is 11.3 electron volts (ev) or 1090 kj/mol. for comparison, the ionization energy of the smaller hydrogen atom is 13.6 ev or 1312 kj/mol. these energies should be comparable (i.e. a similar order-of-magnitude) to the energy holding the electron within the atom, which should in turn be comparable (and a bit larger) than the kinetic energy associated with electron confinement. reminder: to specify large values (e.g. a billion) use scientific notation like so: 1e9 note: required precision is 1%

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Physics, 15.10.2019 04:00, xarianna2007

Calculate (a) the electric potential established by the nucleus of a hydrogen atom at the average distance of the circulating electron (r = 5.29 ✕ 10-11 m), v (b) the electric potential energy of the atom when the electron is at this radius, and ev (c) the kinetic energy of the electron, assuming it to be moving in a circular orbit of this radius centered on the nucleus. ev (d) how much energy is required to ionize the hydrogen atom (that is, to remove the electron from the nucleus so that the separation is effectively infinite)? ev express all energies in electron-volts.

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