Periodic Definition and 437 Threads

One question posed in a general chem book I have were the trends of a couple of reaction types. They don't answer the question of why, though. Maybe you can help... Identify periodic trends of these rxns: Set 1: H2 + X2 --> 2HX (X are halogens) Ex: H2(g) + Cl2(g) --> 2HCL (g)...

I need to find the best oxidizing and reducing agent in the periodic table and say why i chose what i chose. I think the best oxidizing agent is Fluorine and the best reducing agent is Lithium I am not sure if my predictions are correct and if they are I don't know how to explain why I...

Light glows for every 13 seconds. How many times did it glow between 1:57:58 and 3:20:47am

I'm taking solid state, and again and again we use the periodic boundary conditions, that the wavefunction should be unchanged by displacements of the length of the sample, L (assume 1D for simplicity). The argument was that the surface is so far away that it shouldn't have an effect on the...

I have formula for 1D wave equation: (*) u(x, t) = 1/2 [ f(x + ct) + f(x - ct) ] + 1 / (2c) Integral( g(s), wrt s, from x-ct to x+ct ) I am trying to find u(1/2, 3/2) when L = 1, c = 1, f(x) = 0, g(x) = x(1 - x). However, for (*) to work, the initial position f(x) and initial velocity...

Hi guys. I have to do a little written report about Periodic table and I have to write either about Groups, Periods or Transition elements. I have decided to write about Periods. First I wrote what a periodic table is and how it is formed (just a little histry) then I explained the order...

I am working on a problem that has a few angles of approach. I am hoping to get at least that right before I waste too much more time. The problem is a slender, uniform, rigid rod is placed to pivot on its center, so that the rotation is taking place at the ends of the rod. then a spring...

I don't know how to use the extra condition given in the this problem: f^{\prime\prime}+\lambda f = 0, f=f\left(r\right) f\left(r\right) = f\left(r+\pi\right) For \lambda = 0, the solution is some constant. For other \lambda, I put \lambda=k^2, and get f^{\prime\prime}+k^2 f =...

Hi. I am currently working on a problem involving a ball being dropped from a hieght of 4m making a perfectly elastic collision with the ground. Assuming no mechanical energy is lost due to air resistance, I must find the period of the motion. I used the equation V(final) = V(initial) - gt...

Is there a continuous periodic function which is not trigonometric. if yes, what?

I need to plot several cycles of the output response. The waveform is sawtooth, starting at 0 and taking 1 second to peak at 10, returning to 0 in 1 second. The transfer function is S/S+1 So far I've got 10/1-e^-2s ((1/s^2) - ( e^-s/s^2) - (e^-2s/s^2) as the Laplace Transform of the...

Every "spacially periodic" function [i.e. s.t there exist P s.t. f(x+P,t) = f(x,t)] of the form f(x,t) = X(x)cos(wt) is a solution of the wave equation.

Here is my problem: A hard-boiled egg of mass 45.0 g moves on the end of a spring with force constant k = 24.7 N/m. Its initial displacement is 0.290 m. A damping force F = - bv acts on the egg, and the amplitude of the motion decreases to 0.120 m in a time of 5.10 s. I need to find the...

Which elements have electron configurations different from what the periodic table predicts? I have the d-block, but i don't know how/where to get the rest. Suppose in another universe, everything about atomic structure is the same as in our universe BUT there are 3 possible spin states...

What are the periodic trends? I need help with them.. Regarding atomic mass, (first) ionization energy, electronegativity and anything else I am missing. Specially atomic mass, well as you go down a group and atomic number increases, atomic radius increases, ok this makes sense.. number of...

Hi we're beggining to label the orbitals with s p d structures...grade 11 chemistry The question is "Explain why the 2+ ion is the one that tends typically to form" Ive answered the question above this one which says "Ca element 20 forms a 2+ ion. Write the electron configuration of neutral...

Hello all Is there any good way to memorize the charges of elements in the periodic table? Thanks?

The only thing we know is conscious - ourselves - is a lifeform based on carbon, which is in group 4 of the Periodic Table.Silicon is too.Since silicon is found in computers this raises an intriguing possibility that computers could experience emotions and colours and sounds and so on.Silicon...

Project Help I have a Science project due. I am a little gridlocked... I would like to incorporate a mystery type game to this. What I have is the board and rules, but I need questions. 4 sets. Story (For those who have completed GTA: San Andreas, you may recognize some of the scenarios)...

Periodic Table Game Project HELP! I have a Science project due. I am a little gridlocked... I would like to incorporate a mystery type game to this. What I have is the board and rules, but I need questions. 4 sets. Story (For those who have completed GTA: San Andreas, you may recognize some...

I've got one of those "research in other resources" questions in my chemistry homework. (meaning the info isn't in the lecture or the text, I guess ). It goes like this: Consider Group 1A and Group 1B of the periodic table. The text states that although A groups have very regular patterns...

I've heard that there's a periodic tables of particles, I've searched the net but have yielded little results. Is it still in the works? or is it out yet?

Does anyone have any interesting or easy ways to memorize the first, oh, 10 to 40 or so elements (only including the names and the abbv.)? thanks

How would you go about finding the limits of the general laplace transform function for periodic functions?

If you have a molecule with several elements, how do you figure out how many atoms of each element are in it?

Tools of construction of system of elements. Tools of construction of system of elements. www.genevo.org/B.htm[/URL] An old model of atom does not answer many questions about properties. And... I decided to offer you a new one. It is called "ball-bearing model of atom". It is very flexible...

The kaleidoscope of periodic tables.affinity (eV) In my last work I show secondary periodicity on this property for s-elements on the example of the data on electron affinity. In the same place, on the example of d-elements other logic of the tableis visible, - not periodicity but cyclicity...

what periodic motion is used as a reference for our year help will be greatly appreciated

what periodic motion is used as a reference for our year

what periodic motion is used as a reference for our year hope someone can help i can't seem to find this answer

Hi! Does anyone know if there is a periodic table trend for the value of dipole moments...I tried looking it up on the internet and I haven't had any luck maybe someone in here knows..if you do please help! Thanks in advance!

While searching on google i came across with this very intersting periodic table where you can actually see photos of most of the elements (i hope this hasn´t been posted before). It´s called "The Wooden Periodic Table Table" and it´s maintained by one of the founders of Wolfram Research...

Theory of everything is knowing the quantum address of all matter in our quantum tunnel. That a magnetic frequence at such a magnitude that it finds all dimensions around. ANSWER IS = So Fundamental Frequency is the true law of physics and anything can be created and controlled in the...

Im doing a project this yr on the title in the subject and i have been struggling to find information on this problem when using a PERIODIC universe. It would be very useful for me in anyone can post any links to websites/acrobat reader docs regarding this. I have found one where the...

I'm doing a practice exam for a math test on thursday, wondering if anyone could help figure out how to get from one step to the next. i don't think that the background info is necessary for these two steps. the file is attached (Adobe acrobat). what i am wondering about is the answer...

Hello all, I was wondering if anyone could post a link to a page for a better arrangement of elements on the Periodic Table or if not, could give me an example of what a custom arrangement should look like ? Thank you in advance

Along with the nuclear atom article I have posted a unique version of the periodic table. A must see. Notice the center column of semimetals and the overall symmetry. Can be seen at [PLAIN]www.svcc.edu/~duncanb/[/URL]