Compare all the proposed models of an atom given in this chapter.
Solution and Explanation
The proposed models of an atom given in this chapter-
Thomson’s model | Rutherford’s model B | Bohr’s model |
|---|---|---|
| An atom consists of a positively charged sphere and the electrons are embedded in it. | An atom consists of a positively charged center in the atom called the nucleus. The mass of the atom is contributed mainly by the nucleus. | Bohr agreed with almost all points as said by Rutherford except regarding the revolution of electrons for which he added that there are only certain orbits known as discrete orbits inside the atom in which electrons revolve around the nucleus. |
| The negative and positive charges are equal in magnitude. As a result the atom is electrically neutral. | The size of the nucleus is very small as compared to the size of the atom. | While revolving in its discrete orbits the electrons do not radiate energy. |
Top Questions on The Structure of an Atom
- The number of magnetic quantum number values for the angular momentum quantum number \( l = 1 \) is:
- TS POLYCET - 2025
- Chemistry
- The Structure of an Atom
- An orbital can hold only two electrons. This can be explained:
- TS POLYCET - 2025
- Chemistry
- The Structure of an Atom
- Which type of atoms form cations easily?
- TS POLYCET - 2025
- Chemistry
- The Structure of an Atom
- Atoms with low ionization potential and large atomic size:
- TS POLYCET - 2025
- Chemistry
- The Structure of an Atom
- The experimental magnetic moment (3.4 BM) of a hydrated salt of \(Eu^{3+}\) at 300 K is significantly different from calculated value. The difference is due to (Given atomic number of \(E_u\) = 63)
- CUET (PG) - 2023
- Chemistry
- The Structure of an Atom
Questions Asked in CBSE Class IX exam
(Street Plan) : A city has two main roads which cross each other at the centre of the city. These two roads are along the North-South direction and East-West direction.
All the other streets of the city run parallel to these roads and are 200 m apart. There are 5 streets in each direction. Using 1cm = 200 m, draw a model of the city on your notebook. Represent the roads/streets by single lines. There are many cross- streets in your model. A particular cross-street is made by two streets, one running in the North - South direction and another in the East - West direction. Each cross street is referred to in the following manner : If the 2nd street running in the North - South direction and 5th in the East - West direction meet at some crossing, then we will call this cross-street (2, 5). Using this convention, find:
(i) how many cross - streets can be referred to as (4, 3).
(ii) how many cross - streets can be referred to as (3, 4).
- CBSE Class IX
- Coordinate Geometry
- A driver of a car travelling at \(52\) \(km \;h^{–1}\) applies the brakes Shade the area on the graph that represents the distance travelled by the car during the period. (b) Which part of the graph represents uniform motion of the car?
- CBSE Class IX
- Graphical Representation of Motion
- Discuss what these phrases mean to you.
(i) a yellow wood
(ii) it was grassy and wanted wear
(iii) the passing there
(iv) leaves no step had trodden black
(v) how way leads on to way- CBSE Class IX
- The fun they had
- Do you think Innisfree is only a place, or a state of mind? Does the poet actually miss the place of his boyhood days?
- CBSE Class IX
- A truly beautiful mind
- Did Margie have regular days and hours for school? If so, why?
- CBSE Class IX
- The fun they had