Configuration Definition and 253 Threads

I know about quantum numbers and how we do it as 1s,2s,2p,3s,3p,3d etc...but how do I find the number of valence electrons by doing this ? I watched so many videos about this topic and I still don't get it.Possibly because I am trying to learn the portions before even it is taught at school.Can...

Homework Statement An exercise examining the tin atom (Sn). Tin has a ground state electron configuration of ##[Kr]4d^{10}5s^25p^2##. a) Write down the electronic configuration of the first excited state. b) Illustrate with a vector diagram the allowed total angular momentum ##J## values for...

How does one create the single or doubly excited slater determinants in CI? What I mean is using HF, when I get the MO's, I can create the HF slater determinant which runs over electrons in rows and orbitals in columns. What is the form of single or doubly excited slater determinants? Sorry if...

What cause the atomic orbitals electron configuration ? Thanks in advance

Homework Statement Which is the electron configuration of the Ni+ ion? Homework Equations Ni : [Ar]4s23d8 The Attempt at a Solution Ni+: [Ar]4s13d8 Apparently this solution is wrong and should be Ni+: [Ar]3d9 but I do not know why. As far as I know 4s has less energy than 3d so, why does one...

Hello, this is one of the problems in my laboratory manual and it has been killing me. I've been working on this all week. It's due tonight, so hopefully it's not too late... 1. Homework Statement Explain why specific heat is "specific", and how it gives a relative indication of molecular...

What happens if an atom's electronic configuration remains unstable? So we know atoms react with each other to share or transfer electrons, causing them to bond. It's in their nature to do so; if they do not, they'll remain unstable (apart from some Noble gases which are already stable). What is...

We all know that the configuration of Cr is [Ar]4s¹3d⁵ now is this the Ground state or the excited state of Chromium ?

Here is a rotating magnet inside some coil tubes: I recently learned about Faraday's law. Here since the bulb lights, there must be a changing magnetic flux inducing a current throught the bulb. Where is the magnetic flux changing? To me, the magnetic field does not change throught the whole...

I know the Darlington configuration is supposed to sky rocket the beta value of the system, but this is only assuming the pair can handle that current right? It's a silly question but I just wanted to confirm... I have two low current capacity transistors (I_max= 0.2A). so the setup can only...

Hi! I have understood how elements such as Be and Ca, with fully filled 2s orbitals, are not to be considered "noble" because they still have unfilled p orbitals. But I'm having trouble understanding how these elements participate in chemical reactions without having any unpaired electrons. My...

Hello I want to know it we have common Emitter s parameters how can we extract s parameters of common base configuration?if there is no problem give me some examples in converting Thank you

Hi, I'm new to the forum, and I am very sorry if this has been asked before. I am Japanese and therefore my English might be a little bit awkward. I want to ask about term symbols and if they can be used to derive electron configuration in lanthanides. First of all, I do not major in Physics...

This relates to a question I asked recently on Quantum Dots, but I'll rephrase it and hopefully any chemists out there can help. If we have (n,l) = (1,2) where n and l are quantum numbers can we determine the orbitals? and hence the number of electrons in a quantum dot? i.e. And also I've...

[FONT=Tahoma] [FONT=Tahoma]1. My Conceptual Questions (5) is at 3. CONSIDER: Case 1: two dissimilar slabs of material (say slab 1 and slab 2) connected in series (bonded at their...

Please help me to define correctly, in the language of mathematics, the configuration of sets shown on the picture. Homework Statement I'd like to define the following rules: U is a set with infinite members. L is a list or set of properties. Every property (Ls1, Ls2 ... ) have a value (...

I was thinking [Ar] 4s^2, 3d^10, 4p^4 ?

Homework Statement Find the Electrostatic potential energy of a cubical configuration of point charges as shown in the figure. Each of the charges is 5.00e and the edge of the cube is 2 cm. (The image is simply a cube with one of the points labeled q) Homework Equations U=kQq/r The Attempt at...

I calculated Europium to have a electron configuration of 2 8 18 32 3 and then calculated the chemical formula of Europium Chloride which was EuCl3 which is correct but why is the real electron configuration of Europium 2 8 18 25 8 2 ?

Hello, Think of a graph of the magnetic field strength B vs time in a coil, from which a pulsed current passes. The time to reach B is t_1 , and the time to drop to zero again is t_1+t_2 . There is gas inside the coil, and we are trying to create plasma: The initial force applied on one...

Homework Statement A spherical conductor of radius ##a## carries a charge ##q## and also there is a jelly of constant charge density ##\rho## per unit volume extending from radius a out to radius ##b##. Find the electrostatic energy stored in the configuration. Homework Equations ##\oint...

Homework Statement Question: A system consists of 7 equal reliable components having the following configuration with each component has a reliability of 0.9. Find the reliability of the system. Homework Equations I was taught (and only been taught) with the calculations to obtain...

Watch this video: Permanent magnets moving relative to a stationary copper tube generate Eddy currents which result in Joule heating of the copper. Simple enough. Let's change the problem to a rotor with 4 (circumferential) permanent magnets rotating inside a stationary (aluminum or...

L=0 Suborbital Configuration These questions are directed at resident theoretical quantum physicists in PF Regarding suborbitals L 0 I → L 0 VII corresponding to Periods 1 - 7 A total of 14 electron positions exist within Azimuthal Quantum Energy State 0 in Periods 1 through 7...

[FONT="Verdana"]This question is directed at resident theoretical electron physicists in PF Regarding suborbitals L 0 I → L 0 VII corresponding to Periods 1 - 7 There are a total of 14 electron positions within Azimuthal Quantum Energy State 0 in Periods 1 through 7 Additionally...

please delete this post Hello, Accidentally I have noticed a strange behaviour using two different magnets, which I would like to discuss. The picture shows a disc magnet (shown also in the right to see the magnetization) with it's N facing upwards. Onto the disc magnet N side, a cylinder...

Is there a quick way to figure out the total potential energy between more than 2 charges without having to find the potential at each point and the. Multiplying it by the charge at that point and adding it all up? For example - a 2D square with a charges Q, 2Q, -3Q, and another Q at each...

Homework Statement For the elements in COF2, which noble gas electronic configuration is attained in the Lewis structure. The attempt at a solution I'm guessing that each element has a noble gas configuration of neon. Would that be correct. Any clarification would be greatly...

sir in the graphs of electric field due to binary charge configuration why some curves are below x-axis and some are above x axis

If I have a pair of coils connected in an anti-helmholtz configuration, with current flowing oppositely in both, and I wanted to calculate the resistivity- wouldn't the length of both coils just be summed up? I tried this but I am not getting the answer I want.

Homework Statement Hello, so I think I've been looking at this problem way too long, and I'm going no where with it. It is in my attached picture, because it is easier to draw than write out on here. The key says these two are identical compounds, meaning they should have the same...

Assume 5 charged particles (charge 1) constrained to live on the surface of a sphere are in a configuration that minimizes electrostatic potential energy. Are there configurations that are stable but that are not the minimum energy configuration? A simple computer program could quickly(?)...

Its actual electron configuration is 2, 8, 13, 1 even though Vanadium's electron configuration is 2, 8, 11, 2 and Manganese's is 2, 8, 13, 2.

Homework Statement Homework Equations See above picture. The Attempt at a Solution I am stuck on the first part, i know i need to find the x intercept of the DC load line is at +Vcc, and I am pretty sure the y intercept is at Vcc/R7, but I do not know how to use this information to find...

I have read from a few sources that an atom's third energy level can sometimes hold 8 electrons, and other times hold 18. In atoms which possesses enough electrons to exceed the the third energy level, what exactly is it that determines the amount of electrons this energy level can hold?

I have a few confusions related to the delta configuration of a transformer (single-phase transformers used to make a 3-phase transformer): 1) In a closed delta, the windings are connected such that H2 end of one winding is connected to H1 of the other winding. What will happen if one of the...

Homework Statement I'm given this configuration with a AC source at v_{i} with a R_{sig} connect to the source before the capacitor. R_{sig} = 0.6 KΩ R_{G} = 1 MΩ R_{D} = 2.7 KΩ R_{L} = 4.7 KΩ I_{DSS} = 10 mA v_{p} = -6 V Homework Equations The Attempt at a Solution...

Homework Statement Determine A_{V} and A_{i} given β_{D} = 8000 and V_{BE} = 1.6 V. http://img801.imageshack.us/img801/6272/44tv.png Homework Equations The Attempt at a Solution I'm not exactly sure how to solve this problem. This is a problem that my professor solved in class. The only...

My answer key claims it's answer E. I don't think it's right; I think it's cobalt with three unpaired electrons. Not four. A 3d7 configuration, through the Aufbau principle, would fill two of the five d electron pairs completely and leave three half filled. This works mean it's also para...

Homework Statement For Sg+2 what is the electron configuration. The Attempt at a Solution My immediate response would be [Rn] 7s2, 5f14, 6d2 but the answer is [Rn] is 5f14 6d4 Can someone explain this to me?

I don't understand it. I was absent the day it was introduced so I'm behind. I'm trying to learn from google but I can't figure it out. I thought I understood but I guess not. I picked a random element off the periodic table. Gold. I know that's sub level d row 5 column 11 So I thought...

Hi : according to :https://en.wikipedia.org/wiki/Gear#Helicalthe stable configuration is when the cave in one of the gear's "V" teeth drives the arrow of the other "V".where unstable configuration is when the arrow part of V drives the cave of the other Vso assuming the direction of motion is...

It is the procedure you do to get ground term symbol in LS coupling. What is meant by this "ground term"? As in a physical meaning. If you don't know the procedure it is in this link: http://en.m.wikipedia.org/wiki/Term_symbol, please seek "Ground State Term Symbol" Section.

In the "d" orbital of an atom, if it's almost half filled or filled it will get an electron from the nearest "s" orbital to gain a better stability. My question is why not "p" orbital doesn't do such? ns2 (n-1)d9 → ns1 (n-1)d10 ns2 np5 -/→ ns1 np6 ?:cry:

Homework Statement Trying to figure out what this opamp does but can't pinpoint it. Homework Equations The Attempt at a Solution The one with the capacitor looks like an integrator. I attempted to build this circuit to see what it does. At node B I saw a triangle repeating waveform, node A...

Homework Statement Initially switch is at A, and C1 is fully charged (batter=12volts). C2,C3 are initially uncharged. Then switch is moved to B and the charge is redistributed. What is the voltage across C1? [Answer: 8.00volts] What is the voltage across C3? [Answer: 2.67volts]...

Homework Statement Consider a simply supported beam with a block of mass m placed at the midspan and a spring with spring rate k placed between the beam and the ground at the midspan. Find the spring rate required to reduce the static deflection to one half its original value before the...

Homework Statement (2S,3S)-2-chloro-3-methylpentane + high concentration of CH3O- ---> ? The Attempt at a Solution I need to find the product and usually my method is to knock off the -Cl replacing it by -OCH3 and when drawing the compound I just make an mirror image. In...

I have already turned in my homework for chemistry however I'm still confused about this question: Which electron configuration is in an excited state? a.1s2 2s2 2px2 b.1s2 2s1 2px1 2py1 2pz1 My teacher told me that the only choice b was excited because choice a was in violation of Hund's...

Hello, I need some ideas on this problem, but there's a bit of an explanation before I get to the actual problem. Say you have C couples to be arranged over N tables. Rules for arrangement are as follows: 1) Couples may not be seated in the same table (i.e. the husband and wife must be...