Atoms Definition and 900 Threads

Homework Statement The figure shows a potential energy curve for the interaction of two neutral atoms. The two-atom system is in a vibrational state indicated by the heavy solid horizontal line. (a) At r = r1, what are the approximate values of the kinetic energy K, the potential energy U...

Hi I want to figure out how to calculate the temperature at which more energy is required to keep hydrogen and oxygen together (as in the case of H2O) than to separate them...in other words the temperature at which hydrogen and oxygen will no longer combine due to extreme temperatures. How...

I don't understand atoms that well and the thought is so surreal. Can someone please try to help me understand?

I AM TRYING TO PROGRESS IN THIS PROJECT AND ONLY SEE ONE DIRECTION PLEASE IF YOU HAVE ANY KNOWLEDGE OR THEORY OF THIS PLEASE INCLUDE IT! Edit: personal information deleted I’m a sophomore at High school in Arizona. Although I’m most likely not as smart as most people on this forum, I’m...

We know everything on Earth is made up of atoms and molecules, and most likely everything in the solar system, but how do we know everything in the universe uses them, and not something else? The Big Bang would cause things to have similarities, but different parts of the universe could still be...

How many atoms are in one mole of the element Lead(Pb) -Intrepid Elder

It is common to see this line: "atoms are mostly empty space". That line appears inadequate and misleading. Atoms are ultimately made up of electrons and quarks. Electrons and quarks are by definition 'point particles', meaning they have no spatial extent. So there is nothing there that takes...

What the title says

What are the criteria for an atom to have non-zero nuclear spin? This is not homework. Thanks, Jake

Hello, why much substances have one atom when aren't gas and 2 same atom united when are gas (for example N and N2, O and O2) ? Thanks!

Is the reason behind the vibrating the movement of electrons from a stable to a excited state? My quest for knowledge began with this question..."How exactly does light transform into heat--for instance, when sunlight warms up a brick wall? I understand that electrons in the atoms in the wall...

Problem: The adjacent lines in the pure rotational spectrum of 35CI19F are separated by a frequency of 1.12 x 1010 Hz. What is the equilibrium separation of the atoms in this molecule? The attempt at a solution So, the equation I think I need to use to find the equilibrium separation...

This may be a simple question, but I still haven't a clear answer to it. How do atoms bond together? What force is used to bond them together?? (Please if you could answer both of these questions it would be great.) Thanks.

I'm a bit confused about quantum entanglement. First of all, how exactly do you entangle two atoms? I've heard about how they entangled atoms in quantum teleportation experiments, but I don't get how they did it. I've heard that the atoms must "interact", but what exactly does that mean? Do they...

To what extent does the Schrodinger equation apply to an atom as a whole?

This question is pretty straightforward, but I just can't seem to find the answer.. What is the reason that electrons only exist in shells and never between them? A hint that was given to me was to "think about quantum energy". I was thinking because if they wouldn't exist in shells, then...

Homework Statement When specially prepared Hydrogen atoms with their electrons in the 6d state are placed into a strong uniform magnetic field, the degenerate energy levels split into several levels. This is the so called normal Zeeman effect. A) Ignoring the electron spin what is the...

When we provide thermally or optically en energy higher than the semiconductor bandgap we create elctron-hole pairs, that is electrons are extracted to the valance band and they become free to move inside the crystal. My question is: are the semiconductor atoms then ionized, which means for...

Are there ever atoms being added to the universe? If not could we in the future be able to follow an atom through several different changes that it might experience?

I am trying to get the most complete picture of the structure of atom. I understand generally how elements and molecules are formed, however the last thing I was taught about atoms was 10 years ago. I was told about the electron proton and nuetron and that's it. I know this is just the basic...

how close are the atoms in any solid, is all the space possible in a solid is filled up by its atom finally can we consider an atom an isolated body ,or can size of strings pass between inter atomic spaces.i believe atoms in the solid is not actually in contact but there exists infinitsimally...

3.2kg of iron is required to make a hollow spherical shell having inner radius (r=3cm).outer radius(r=5cm). i)estimate density of iron. (ans :6.585g/cm^3) -not sure if its correct though ii) using (i),est interatomic spacing of the iron atoms. the atomic mass of iron is 55.9u. need help...

A certain amount N_0 of a radioactive isotope with decay constant \lambda_1 is injected into a pacient. Besides that isotope's natural decay process, there's also a biological elimination process, with decay constant \lambda_2. Now, at time t, the number of remaining isotope atoms is given...

Hi. First post. I'm trying to understand if electronic energy levels have fixed values, or merely fixed expectation values (in the latter case, orbital electrons could have any energy and it's only the average that would be fixed). Here's my argument for the latter. If it's incorrect, could...

Hi I am new here. I am not really a science buff, i only just started reading about physics a week ago. I come from a media and fitness background, but I joined to ask a quick question that I thought someone here could best answer - I can see atoms in the air sometimes in light only and my eyes...

What causes the "random" decay of atoms in different interpretations? I'd like proponents of each interpretation to explain what their interpretation says about this issue? What happens/causes radio active decay? I know that atleast dBB and MWI needs to have a deterministic answer to this...

Hi all, Can someone tell me how old are the atoms my body is made off? In other words, how old am I really? THANKS

Atoms were created 300,000 years after the big bang when the universe had finally cooled down enough. Did gravity exist before that point in time? If so what did it act like? thanks :)

Sorry if this has been posted already. Its a Canadian led study! "Antimatter atoms have been held captive and kept in existence for a whopping 16 minutes by a Canadian-led team — far longer than the researchers thought possible. "It was quite a surprise," said Makoto Fujiwara, lead author of a...

Please someone, answer this question for me...Do atoms exist in perpetual motion? I have heard we have never discovered anything capable of perpetual motion, but aren't atoms always moving? Please answer.

Hi. I am trying to find the classical turning points in semi-parabolic coordinates for the hydrogen atom when an electric field is being applied to it in the y-axis. I am reading an article for those who are interested called Classical, semiclassical, and quantum dynamics in the lithium...

Hello If I entangle to atoms in close proximity to each other, is there any way I can separate these atoms by a large distance and maintain their entanglement? Thank you.

Homework Statement Suggest one way to yield ammonium salt of ephedrine from reactants phenacetin and ephedrine . In the ans. consider both phenacetin and ephedrine as containing nitrogen. Explain why they would differ in reactivity and solubility. Homework Equations - The Attempt...

A plasma is when electrons become unbound by their atoms. So does that mean that you can get a different plasma for all different types of atoms (like gold plasma and helium plasma)? Also the electrons are not free as they are bound to the plasma (but not individual neuclei) by the magentic...

Quantum numbers of atoms in a given state "(number^number)letter" Homework Statement An atom is in the state 42F. Write down the values of n,l,s and j. Homework Equations The Attempt at a Solution n=4 l=3 I'm having problems with s and j. I know j=l+s, does one...

Homework Statement In outer space the density of matter is about one atom per cm^3, mainly hydrogen atoms , and the temperature is about 2.7 K. Calculate the rms speed of these hydrogen atoms, and the pressure (in atmospheres). Homework Equations.5mv^2 = 3/2 KT The Attempt...

Homework Statement In outer space the density of matter is about one atom per cm^3, mainly hydrogen atoms , and the temperature is about 2.7 K. Calculate the rms speed of these hydrogen atoms, and the pressure (in atmospheres). Homework EquationsPV = NkT The Attempt at a...

Firstly be easy on me, I'm 17 and still in high school and English is not my first language so go easy on the heavy vocabulary. I was wondering the other day, what is it that gives atoms its properties? If air would be densed to as thick as water, would it have the same properties? I don't...

HI, I want to reproduce results from the article (attached). I need to get parameters of interaction between atoms of H2 and C6H6 for Morse equation. I easily got results of interation between MOLECULES H2 and C6H6, shown in Table S2 'The first-principles and Morse force field (eq.1)...'...

So I've seen radial equations for Hydrogen out there (eg http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/hydrad.html), where can I find one for more any arbitrary atom? admitedly, I realize that the equations become more and more complicated the larger the atom is. This is especially...

2.3 \cdot 10^{10} atoms decay via alpha emission have a half-life of 150 min. How many alpha particles are emitted between t=30 min and t=160 min? \begin{flalign*} 150 &= \frac{\ln 2}{\lambda}\\ \lambda &= 0.046 \\ \\ K &= K_{0}e^{(-\lambda)(t)}\\ &= (2.3 \cdot 10^{10})e^{(-0.046)(30)}\\...

So, I was brushing my teeth and started thinking about pi and how it is irrational. One thing led to another and I remembered Atom, by Asimov (which I haven't yet finished). Now, assuming pi is irrational, if we have a wheel with a radius of 1/2 (units don't really matter), and unroll it so that...

I've been looking at the original Herman-Skillman program that solves for the energy levels of a single atom using Hartree-Fock with Slater exchange orbitals. There is one part I can't understand: the expression of the correction to the energy level for a good guess. What the program *does* is...

I there,i am new of the forum, i was wonder if atoms die or get old... For example,if i drop a piece of paper on the ground in a bit of time it will be destroyed right?by the atmosphere and weather condition,but this mean that the atoms will no be there anymore?that mean that the strong bond...

I have a question which I would like to know the answer to, I posted it before but don't think I was understood correctly, hopefully I can make myself clearer this time. Every physical object in this universe has a natural or resonant frequency from an atom to a planet. Attached is an image of...

Hi guys As far as I have understood the technique of optical puming (OP), then if we look at the hyperfine state F=2 (for example), then OP can be used to prepare the atoms in the state F=2, mF=2, but not any other (i.e., lower) mF. Is there no technique for preparing atoms in a state with a...

Homework Statement The potential energy of two atoms with a radius r is written as- U(r)= -4Uo[(Ro/r)^12 -(Ro/r)^6] Find the radius at stable equilibrium and the work required to separate the two atoms. Homework Equations F(r) = -dU(r)/dr The Attempt at a Solution If...

hi, I asked myself: how can something like superfluidity exist between atoms, when there should always be van der waals forces and therefore an interatomic interaction? so imho there should always be this kind of friction between the atoms. where am I wrong?

Is this why? The atoms of each element vibrate at different oscillations. Which means that not all elements atoms vibrate at the same type of light etc. When EM radiation hits the atom, some it it hits the electrons and the energy is transferred into the electron, since the electron has...

I am told that when an atom absorbs a photon, it jumps up an energy level, these are discrete levels of energy etc etc. What determines how long the electron will hold this energy, and what exactly is the photon (wave) doing to up it's energy level. For ease of explanation, let's assume Neon...