Later+atomic+models

=later atomic models=

In this page, we will talk about later atomic model-**The Rutherford-Bohr Model** of the atom.

 * INDEX**:

(a)** Discovered the alpha, beta and gamma particles **(1899 and later)

 * The penetration of alpha,beta and gamma particles

. ........................................................................#Table1.....................................................................**

(b)** Correctly interpreted the nature of radioactivity **(1902)
Rutherford found that the radioactive decay of an element cause the new elements formed.

(c)** Discovered the true nature of the alpha particle **(1908)
Rutherford found that α-particles were **He2+** ions.(see table 1)

...............................................................[[image:ruth_scat.jpg]].........................................
====**The experiment which help rutherford to find the nucleus. (**It shows that the "plum pudding"model by Thomas should be abandoned // The"plum pudding"model assume the protons and electrons contribute distribute throughout the volume of the atom-the fact is that the most of the atom should be empty and nucleus contain almost all // //the mass of the atom// ** . )**====

[[image:ldldlld.JPG]]
====***. Rutherford's work was concerned with the atomic nucleus and was not concerned with what the electrons were doing. (//So Rutherford's work do not in conflict//** **//with Dalton's work because Dalton cares about the manner in which atoms had constant properties and were able to combine in specific ways//.)**====

—** similar in structure to the solar system **, but with electrostatic force providing attraction, rather than gravity.
====Since the Bohr model is a quantum physics-based modification of the Rutherford model, many sources combine the two, referring to the **Rutherford-Bohr model**. ====

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====** Strength **: Able to explain the organization of charges in an atom ** Weakness **:Doesn't clearly explain how the electrons are organized outside of nucleus (especially if an atom has many electrons!). ====

**Weakness** :

 * references:**

[|www.google.com.hk/]

[|www.wikipedia.org/]