Disclosure: when you buy through links on our site, we may earn an affiliate commission.

Modern Physics – Atoms

IIT JEE Main | Advanced | BITSAT | SAT | NEET | AP Physics | MSAT | MCAT | Course for high school, college
0.0
0.0/5
(0 reviews)
2 students
Created by

9.0

CourseMarks Score®

9.9

Freshness

N/A

Feedback

7.7

Content

Platform: Udemy
Video: 2h 22m
Language: English
Next start: On Demand

Top Physics courses:

Detailed Analysis

CourseMarks Score®

9.0 / 10

CourseMarks Score® helps students to find the best classes. We aggregate 18 factors, including freshness, student feedback and content diversity.

Freshness Score

9.9 / 10
This course was last updated on 3/2022.

Course content can become outdated quite quickly. After analysing 71,530 courses, we found that the highest rated courses are updated every year. If a course has not been updated for more than 2 years, you should carefully evaluate the course before enrolling.

Student Feedback

We analyzed factors such as the rating (0.0/5) and the ratio between the number of reviews and the number of students, which is a great signal of student commitment.

New courses are hard to evaluate because there are no or just a few student ratings, but Student Feedback Score helps you find great courses even with fewer reviews.

Content Score

7.7 / 10
Video Score: 7.9 / 10
The course includes 2h 22m video content. Courses with more videos usually have a higher average rating. We have found that the sweet spot is 16 hours of video, which is long enough to teach a topic comprehensively, but not overwhelming. Courses over 16 hours of video gets the maximum score.
Detail Score: 9.6 / 10

The top online course contains a detailed description of the course, what you will learn and also a detailed description about the instructor.

Extra Content Score: 5.5 / 10

Tests, exercises, articles and other resources help students to better understand and deepen their understanding of the topic.

This course contains:

0 article.
0 resource.
0 exercise.
0 test.

Table of contents

Description

Atoms
•Alpha-particle scattering experiment
•Rutherford’s model of atom
•Bohr model
•Energy levels
•Hydrogen spectrum
SUMMARY
1. Atom, as a whole, is electrically neutral and therefore contains equal amount of positive and negative charges.
2. In Thomson’s model, an atom is a spherical cloud of positive charges with electrons embedded in it.
3. In Rutherford’s model, most of the mass of the atom and all its positive charge are concentrated in a tiny nucleus (typically one by ten thousand the size of an atom), and the electrons revolve around it.
4. Rutherford nuclear model has two main difficulties in explaining the structure of atom: (a) It predicts that atoms are unstable because the accelerated electrons revolving around the nucleus must spiral into the nucleus. This contradicts the stability of matter. (b) It cannot explain the characteristic line spectra of atoms of different elements.
5. Atoms of each element are stable and emit characteristic spectrum. The spectrum consists of a set of isolated parallel lines termed as line spectrum. It provides useful information about the atomic structure.
6. The atomic hydrogen emits a line spectrum consisting of various series.
7. To explain the line spectra emitted by atoms, as well as the stability of atoms, Niel’s Bohr proposed a model for hydrogenic (single elctron) atoms. He introduced three postulates and laid the foundations of quantum mechanics: (a) In a hydrogen atom, an electron revolves in certain stable orbits (called stationary orbits) without the emission of radiant energy. (b) The stationary orbits are those for which the angular momentum is some integral multiple of h/2π. (Bohr’s quantisation condition.) That is L = nh/2π, where n is an integer called a quantum number. (c) The third postulate states that an electron might make a transition from one of its specified non-radiating orbits to another of lower energy. When it does so, a photon is emitted having energy equal to the energy difference between the initial and final states. The frequency (ν) of the emitted photon is then given by hν = Ei – Ef An atom absorbs radiation of the same frequency the atom emits, in which case the electron is transferred to an orbit with a higher value of n. Ei + hν = Ef.
8. As a result of the quantisation condition of angular momentum, the electron orbits the nucleus at only specific radii. The n = 1 state is called ground state. In hydrogen atom the ground state energy is –13.6 eV. Higher values of n correspond to excited states (n > 1). Atoms are excited to these higher states by collisions with other atoms or electrons or by absorption of a photon of right frequency.
9. de Broglie’s hypothesis that electrons have a wavelength λ = h/mv gave an explanation for Bohr’s quantised orbits by bringing in the waveparticle duality. The orbits correspond to circular standing waves in which the circumference of the orbit equals a whole number of wavelengths.
10. Bohr’s model is applicable only to hydrogenic (single electron) atoms. It cannot be extended to even two electron atoms such as helium. This model is also unable to explain for the relative intensities of the frequencies emitted even by hydrogenic atoms.

You will learn

✓ Introduction
✓ Alpha-particle scattering and Rutherford’s nuclear model of atom
✓ Atomic spectra
✓ Bohr model of the hydrogen atom
✓ The line spectra of the hydrogen atom
✓ De Broglie’s explanation of Bohr’s second postulate of quantisation

Requirements

• Should know calculus, trigonometry

This course is for

• Complete Physics for Engineering and Medical Entrance Exam Preparation. ( IIT JEE Main | Advanced | BITSAT | SAT | NEET etc.)
• AP Physics | MSAT | MCAT | Course for high school, college
• Courses are suitable for students from over 160 countries from Europe, America, Middle East, Asia, Africa and APAC. Notably England, Germany, France, Sweden, Ireland, Scotland, USA, Canada, UAE, Saudi, Qatar, Kuwait, Malaysia, Indonesia, Myanmar, Newzealand, Australia, South Africa, South Korea, Nigeria, etc

How much does the Modern Physics - Atoms course cost? Is it worth it?

The course costs $14.99. And currently there is a 25% discount on the original price of the course, which was $24.99. So you save $10 if you enroll the course now.

Does the Modern Physics - Atoms course have a money back guarantee or refund policy?

YES, Modern Physics – Atoms has a 30-day money back guarantee. The 30-day refund policy is designed to allow students to study without risk.

Are there any SCHOLARSHIPS for this course?

Currently we could not find a scholarship for the Modern Physics - Atoms course, but there is a $10 discount from the original price ($24.99). So the current price is just $14.99.

Who is the instructor? Is studi live a SCAM or a TRUSTED instructor?

studi live has created 115 courses that got 13 reviews which are generally positive. studi live has taught 111 students and received a 4.4 average review out of 13 reviews. Depending on the information available, studi live is a TRUSTED instructor.
Online Learning
Studi Live is an Indian educational venture based in Mumbai. The founders of this portal are into education and technology domains since more than 20 years. Studi Live currently offers online and live lectures for IITJEE and NEET preparation.
The portal will eventually add courses for school students from 5th to 12th, Olympiads, Professional Courses, Commerce and Software Programming for all levels. The Studi Live portal, as the name suggests, offers online live lectures in interactive mode. The site uses highly safe and secure WEBEX platform for online lectures.
Unlike most of the other edtech portals, Studi Live is a collaborative and activity-based platform which strives to conform to the New Education Policy by the Government of India.

9.0

CourseMarks Score®

9.9

Freshness

N/A

Feedback

7.7

Content

Platform: Udemy
Video: 2h 22m
Language: English
Next start: On Demand

Students are also interested in

Review widget (for course creators):

Modern Physics - Atoms rating
Code for the widget (just copy and paste it to your site):
<a href="https://coursemarks.com/course/modern-physics-atoms/" target="_blank" title="Modern Physics – Atoms on Coursemarks.com"><img border="0" src="https://coursemarks.com/widget/90.svg" width="200px" alt="Modern Physics – Atoms rating"/></a>