Chemistry Stack Exchange
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Questions tagged [electrons]

Electrons are subatomic particles with the symbol e−. They have a negative electric charge (-1 elementary charge. )

From the IUPAC goldbook:

Elementary particle not affected by the strong force having a spin quantum number $\frac12$, a negative elementary charge and a rest mass of 0.000 548 579 903 13 u.

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What happens when an electron in a metal is excited?

For special glasses, crystals, or gases absorb energy from an electrical current or another laser they become "excited." The excited electrons move from a lower-energy orbit to a higher-energy orbit around the atom's nucleus. When they return to…
user54812
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Are electron shells probability distributions?

I know that orbitals are probability distributions. Are electron shells probability distributions too?
Hal
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Anions produce flame colour?

I know that flame tests can be used to distinguish between some metal ions, and that the colours come from excited electrons returning to the ground state. My question is, why don't non-metal anions also produce colours? Are their emission spectra…
Son Jerm
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Velocity of electrons ejected from Cl atom

When neutral $\ce{Cl}$ atoms are bombarded by high energy photons, causing ejection of electrons, which subshells' ejected electrons will have highest velocity? I chose $1s$ because I thought more energy is needed to ejected those electrons so they…
CocoxXxPuffs
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Electrons split in Stern-Gerlach experiment but not in Thompson's experiment?

So when electrons are fired through a magnetic field in Stern-Gerlach experiment they split into two beams depending on their spin but where was this phenomena when Thompson was calculating charge to mass ratio of electron? Shouldn't his cathode ray…
Arnav
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What does it mean by 'photons of higher intensity'?

I found an Assertion and Reason question related to transition energy in Bohr's orbits. Assertion In the H-atom, photons of higher intensity are emitted when electron falls from the 2nd to 1st orbit than when it falls from the 4th to 2nd…
Siddharth Venu
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Electrochemical cell-SRP value

On what basis can the SRP value of different elements in the periodic table be explained? For example why does Cu have a greater tendency to accept an electron and Zn have a tendency to lose electrons in a Daniel cell?
Rahul
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How would you find the expected molecular orbital energy diagram for compounds such as NO?

How would you find the expected molecular orbital energy diagram for $\ce{NO}$? Would it be the expected one for $\ce{O2}$? Or the one for $\ce{N2}$? Also, would the ionization energy be bigger than that of$\ce{NO+}$?
David Quizlet
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Why, in an applied magnetic field, is electron with spin parallel to the magnetic field higher?

My lecturer today said that when an applied magnetic field, $B_0$, is applied, the electron with spin parallel to $B_0$ is higher in energy than the electron with spin antiparallel to $B_0$. Similarly, in protons, it is the opposite; parallel spin…
Patrick Robertson
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Does an "excited atom" lose energy gradually?

When an electron absorbs energy and is in a higher energy orbit (I guess the atom would be in an unstable state), when the electron releases this energy, would all of this energy be released at the same time, or could it release energy one "level"…
MxLDevs
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Observation of deflection in the Cathode ray experiment

In the Cathode Ray Experiment used to discover the electron, (This is what my textbook says (Grade 11) so if there's any additional parameters that I do not know of I apologize) The cathode ray tube has two electrodes and a evacuation. Under low…
ZeroTerra
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Is the valence band neutral?

While studying about band theory of semiconductors, I observed that when the electrons were excited from the valence band to the conduction band, they left behind holes in the valence band. From my existing knowledge, I believe that the valence…
R004
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Question on deflection of cathode rays in a magnetic field

My book states that : When only electric field is applied, the electrons deviate from their path and hit the cathode ray tube at point A. Similarly when only magnetic field is applied , the electron strikes the cathode ray tube at point…
Ashok Sharma
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Effective nuclear charge and repulsion of electrons

Effective nuclear charge increases across a period. This is justified because number of protons increase in nucleus across a period, and there's no change in the number of "shielding" electrons. However, wouldn't valence electrons repulse each…
lost-in-nucleophiles
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Electron orbital filling order

In the p sub shell there are 3 orbitals, m=-1, m=0, m=1 which are listed by axis x,y, and z. Some show as -1=x,0=y,1=z Another shows -1=x,0=z,1=y Some pictures and text also show the filling order as ‘xyz’ and others state that the z axis is…
Howard
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