Q. 385.0( 2 Votes )

Enlist the conclusions drawn by Rutherford from his α-ray scattering experiment.

Answer :

Rutherford designed an experiment to know about the arrangement of electrons within an atom. He took a gold foil on which the fast-moving alpha particles were made to fall. He took a very thin layer of gold foil which was about 1000 atoms thick.

Rutherford concluded the following from the α-particle scattering experiment:


(i) Most of the alpha particles passed through the gold foil without getting deflected. This concluded that most of the space inside the atom is empty. This observation was totally unexpected.


(ii) Some of the α-particles were deflected by the foil by small angles. The number of particles which were deflected was very small. This shows that the positive charge of the atom occupies very little space.


(iii) Surprisingly one out of every 12000 particles appeared to rebound meaning they were deflected by 180 degrees. This concluded that all the positive charge and the mass of the atom were concentrated in a very small volume within the atom.


From the data, he also calculated that the radius of the nucleus is about 105 times less than the radius of the atom. Based on this data Rutherford put forward the model of an atom which had a positively charged center called nucleus. It also had the electrons which revolved around the nucleus in well defined orbits.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Quiz | Bohr's-Bury Rule and ValencyQuiz | Bohr's-Bury Rule and ValencyQuiz | Bohr's-Bury Rule and Valency62 mins
Atomic NumberAtomic NumberAtomic Number46 mins
Electronic ConfigurationElectronic ConfigurationElectronic Configuration34 mins
How Radioactivity Works?How Radioactivity Works?How Radioactivity Works?29 mins
What an Atom holds?What an Atom holds?What an Atom holds?41 mins
ValencyValencyValency31 mins
Quiz | Check Your Concepts on An AtomQuiz | Check Your Concepts on An AtomQuiz | Check Your Concepts on An Atom34 mins
Get To Know Electronic ConfigurationGet To Know Electronic ConfigurationGet To Know Electronic Configuration35 mins
Champ Quiz | Important Questions of AtomChamp Quiz | Important Questions of AtomChamp Quiz | Important Questions of Atom41 mins
Learn How to Write The FormulaLearn How to Write The FormulaLearn How to Write The FormulaFREE Class
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :