1.
An electron is moving in Bohr's forth orbit.Its de-brogile wave length is λ what is the circumference of forth orbit.
2.
lightest fundamental particle is
3.
Which of the following particle have more electron than Neutron
4.
What is the ratio of mass of an electron to the mass of proton
5.
The Nucleus of helium contains
6.
Number of unpaired electrons in inert gas is
7.
Rutherford experiment prove
8.
Electromagnetic radiation with maximum wave length is
9.
An element has 8 electrons in the valence shell
10.
Rutherford scattering experiment is related to size of
11.
Nuclei tend to have more neutrons than protons at high mask numbers because
12.
alpha particles are represented by
13.
Which one is the following has unit positive charge and one amu mass
14.
An elementary particle is
15.
The number of electron in one molecule of CO2
16.
The ratio of charge and mass would be greater for
17.
Proton was discovered by
18.
Who discovered neutron ?
19.
Which is not deflected by magnetic field.
20.
The proton and neutron are collectively called as
21.
Penetration power of proton is
22.
The number of electron in the nucleus of -CONH2 is
23.
The number of electron in the nucleus of C12 is
24.
A neutral atom ( Atomic number > 1 ) consist of
25.
The atomic number of an element is 35 and mass number is 81 the number of electron in outermost Shell is
26.
Positive ions are formed from the neutral atom by the
28.
The number of electron in the nucleus of Cl is
29.
The number of neutron in heavy hydrogen atom is
30.
Number of electrons in the outermost orbit of the element of atomic number 15 is
31.
The nucleus of the atom consist of
32.
The mass of an atom is constituted mainly by
33.
Neutron are found in atoms of all elements except in
34.
Nuclear theory of atom was put forward by
35.
Anode rays were discovered by
36.
The discovery of neutron becomes very late because
38.
Who discovered that cathode rays are made up of elecrtrons
39.
The fundamental particles present in the nucleus of an atom are
41.
Mass of neutron is approximately.............. times of mass of electron
42.
α particle is identical with
43.
6 Proton are found in nucleus of
44.
Atom was discovered by
45.
The nature of anode rays depends upon
