How do you know that nucleaus is very small as compared to size of atom

Open in App

Solution

Dear Student,

The size of the atom is about 10^-10m while that of nucleus is 10^-15 m. This was calculated from Rutherford alpha particle scattering experiment. Rutherford established the presence of a small nucleus in the atom in which all the mass of the atom is concentrated. According to him, the nucleus is very dense and hard and the electrons are at a distance from the nucleus and are constantly revolving around the nucleus in closed orbits.
During the alpha scattering experiment he observed that 1/10000 rays are deflected back showing that the space occupied by the nucleus is small. And one more observation he made is most of the rays undergoes without any deflection showing that the most of the spaces are empty in the nucleus.

Regards
Regards,

Suggest Corrections

Similar questions

Q. After completing the gold foil experiment, Rutherford concluded that the size of the nucleus is very small compared to the size of the atom. This is because :

Question 2

Why does $H^{+}$ ion always get associated with other atom or molecules?

(a) Ionisation enthalpy of hydrogen resembles that of alkali metals.

(b) Its reactivity is similar to halogens

(d) Loss of an electron from hydrogen atom results in a nucleus of very small size as compare to other or ions. Due to small size it cannot exist free.

Q. The ratio of the radii of hydrogen atom and its nucleus is

10^{5} .

Assuming the atom and the nucleus to be spherical, how will you compare the ratio of their sizes?

Q. Compared to size of its nucleus, the size of an atom is about :

Q. Following conclusions were drawn from the given figure :
I. There is a positively charged centre in an atom called the nucleus.
II. An atom consists of a positively charged sphere and the electrons are embedded in it.
III. The electrons revolve around the nucleus in well-defined orbits.
IV. The size of the nucleus is very small as compared to the size of the atom
V. Only certain special orbits known as discrete of electrons are allowed inside the atom.
Choose the correct statements.

Join BYJU'S Learning Program