Download App

Structure of Atom — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryStructure of Atom2 Marks
Question
When would the wavelength associated with an electron be equal to the wavelength associated with a proton? Mass of electron = 9.1095 × 10-28g; Mass of proton = 1.6725 × 10-24g.

OR

Calculate the velocity condition for the wavelength associated with a moving electron to be equal to the wavelength associated with a moving proton.

(Mass of electron = 9.11 × 10-48g; Mass of proton = 1.67 × 10-24g; h = 6.6 × 10-34Js; J = kg/ m2s-2).

✓

Answer

$\lambda_\text{e}=\frac{\text{h}}{\text{m}_\text{e}\text{V}_\text{e}}$
$\lambda_\text{p}=\frac{\text{h}}{\text{m}_\text{p}\text{V}_\text{p}}$
$\Rightarrow\lambda_\text{e}=\lambda_\text{p}$
$\lambda_\text{e}=$ wavelengh of electron
$\lambda_\text{p}=$ wavelength of proton
Where, me = mass of electron
mp = mass of proton
Ve = velocity of electron
Vp = velocity ofproton,
$\Rightarrow\text{m}_\text{e}\text{V}_\text{e}=\text{m}_\text{p}\text{V}_\text{p}$
$\Rightarrow\frac{\text{V}_\text{e}}{\text{V}_\text{p}}=\frac{\text{m}_\text{p}}{\text{m}_\text{e}}=\frac{1.6725\times10^{-24}}{9.1095\times10^{-28}}=1836$
$\Rightarrow\text{V}_\text{e}=1836\text{V}_\text{p}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "2 Marks Questions" from Structure of Atom→Structure of Atom — all question types→Chemistry STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

Consider the elements:
Cs, Ne, I and F
Identify the element which exhibits neither the negative nor does the positive oxidation state.
→
$\text{Zn}\text{(s)}+\text{Cu}^{2+}\text{(aq)}\xrightarrow{ \ \ \ \ \ \ \ \ }\text{Zn}^{2+}\text{(aq)}+\text{Cu}\text{(s)}$ Is this reaction redox reaction? If yes, name the oxidising agent as well as reducing agent.
→
What is the correct order of priority for following functional groups of organic compound in IUPAC nomenclature?
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ {\text{ O}}\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \|\\-\text{COOH}-,-\text{OH},-\text{CHO},-\text{C}-$
→
Calculate the wavelength, frequency and wavenumber of a light wave whose period is $2.0 \times$ $10^{-10} s$.
→
Write formula for the following compound:

Tin(IV) oxide.

→
A swimmer coming out from a pool is covered with a film of water weighing about 18g. How much heat must be supplied to evaporate this water at 298K? Calculate the internal energy of vaporisation at 100°C.

$\Delta_\text{vap}\text{H}^\circ$ for water at 373K = 40.66kJ mol-1.

→
Which will have CO2 to more extent, hot cold drink bottle or chilled cold drink bottle, why?
→
Write formula for the following compound:

Iron(III) sulphate.

→
Carbon monoxide is allowed to expand isothermally and reversibly from 10m3 to 20m3 at 300K and work obtained is 4.754kJ. Calculate the number of moles of carbon monoxide.
→
Why are positive ions called cations, whereas negative ions are called anions?
→