Download the App!

Get 24/7 study help with the Numerade app for iOS and Android! Enter your email for an invite.

Get the answer to your homework problem.

Try Numerade free for 7 days

Like

Report

Thermal neutrons are neutrons that move at speeds comparable to those of air molecules at room temperature. These neutrons are most effective in initiating a nuclear chain reaction among $^{235} \mathrm{U}$ isotopes. Calculate the wavelength (in $\mathrm{nm}$ ) associated with a beam of neutrons moving at $7.00 \times 10^{2} \mathrm{m} / \mathrm{s}$. (Mass of a neutron $\left.=1.675 \times 10^{-27} \mathrm{kg} .\right)$

$p m b \lambda=\frac{6.63 \cdot 10^{-34} \cdot \frac{m^{2} \cdot k g}{s}}{1.674 \cdot 10^{-27} k g \cdot 7 \cdot 10^{2} \frac{m}{s}} \approx 5.66 \cdot 10^{-10}=p m b 0.566 n m$

Chemistry 101

Chapter 7

Quantum Theory and the Electronic Structure of Atoms

Electronic Structure

Drexel University

University of Kentucky

University of Toronto

Lectures

04:49

In chemistry and physics, electronic structure is the way the electrons of an atom are arranged in relationship to the nucleus. It is determined by the subshells the electrons are bound to, which are in turn determined by the principal quantum number ("n") and azimuthal quantum number ("l"). The electrons within an atom are attracted to the protons in the nucleus of that atom. The number of electrons bound to the nucleus is equal to the number of protons in the nucleus, which is called the atomic number ("Z"). The electrons are attracted to the nucleus by this mutual attraction and are bound to the nucleus. The electrons within an atom are attracted to each other and this attraction determines the electron configuration. The electron configuration is described by the term symbol, which is the letter used to identify each subshell.

16:45

In physics, the wave–particle duality is the concept that every object or process, no matter how large or how small, behaves as both a wave and a particle. The wave–particle duality is one of the central concepts in quantum mechanics.

03:23

Thermal neutrons are neutr…

03:27

01:03

Neutrons (mass $\left.=1.6…

02:06

Neutrons are used to obtai…

03:43

The neutron has a mass of …

03:52

02:18

The neutrons produced in a…

01:05

A "thermal neutron&qu…

01:11

What is the wavelength, in…

So in this question, we were looking for the wavelength Una meters for a beam of neutrons that have a velocity of 7.0 times, sends us circuit meters per second and were also given a massive neutron, which is 1.6 so five I'm stones in 1927 years. So when we're looking for the wavelength of particle with mass, you want to use their deplorably creation, which is Lambda equals H thanks. Constant over the mass times the velocity. And so we have everything that we need. And there are a correct units because then lastly, civilian kilograms and the velocity and use to be immune hours for seconds and place Constance is 6.626 Hi. I'm stunted in negative 34 Truell seconds. And if we break down the jewell a little bit further Ah, one Jewell He calls one kilogram meter square per second's work just so that we see their units cancel when we plug it it. So when I can Thanks constants again. I just putting in here since 6.626 I was starting to, and I get no credit for you. Kill a ground. Wieder Square. The second squared. You know, we have time, seconds, slow time, Seconds E. And just from looking at that, right, one of the seconds. Cancel their thanks. That are the bottom. A mass 1.605 times. Tents in the 1927 kilograms times a velocity of the neutron. 7.0 I was trying to second meanders for seconds. And now if you look at the units, very kilograms cancels. And that's why we need a massive and kilograms. And then one of the meters cancels with this one seconds cancels with that one. And we're left with meters and we're doing the calculator. We get by 8.65 I was time. Something like 10 meters in an If we convert that two nanometers, he's a little of the Brian. So one meter. Well, it's tensile in my manor meters. And that gives us zero Quiet. Yes. Your point First expired animals

View More Answers From This Book

Find Another Textbook

Numerade Educator

11:00

Predict the geometries of the following ions: (a) $\mathrm{NH}_{4}^{+}$(…

04:56

Without referring to a periodic table, write the electron configuration of e…

07:49

Write equilibrium constant expressions for $K_{\mathrm{c}},$ and for $K_{P},…

01:56

A jogger runs a mile in 8.92 min. Calculate the speed in (a) in/s, (b) $\mat…

03:55

On the basis of oxidation number considerations, one of the following oxides…

01:41

Determine the amount of heat (in kJ) given off when $1.26 \times 10^{4} \mat…

03:48

Identify the elements represented by the following symbols and give the numb…

01:23

Define dipole moment. What are the units and symbol for dipole moment?

04:01

The thickness of a piece of paper is 0.0036 in. Suppose a certain book has a…

04:59

Which of the following species are tetrahedral? $\mathrm{SiCl}_{4}, \mathrm{…