1.
Electromagnetic radiation with maximum wave length is
2.
Nuclear theory of atom was put forward by
3.
Atom was discovered by
4.
Number of electrons in the outermost orbit of the element of atomic number 15 is
5.
Proton was discovered by
6.
Rutherford experiment prove
7.
Positive ions are formed from the neutral atom by the
8.
The number of neutron in heavy hydrogen atom is
9.
What is the ratio of mass of an electron to the mass of proton
10.
Anode rays were discovered by
11.
The fundamental particles present in the nucleus of an atom are
12.
The proton and neutron are collectively called as
14.
Mass of neutron is approximately.............. times of mass of electron
15.
Who discovered neutron ?
16.
alpha particles are represented by
17.
Which of the following particle have more electron than Neutron
18.
The number of electron in the nucleus of C12 is
19.
Number of unpaired electrons in inert gas is
21.
The number of electron in the nucleus of Cl is
22.
The mass of an atom is constituted mainly by
23.
α particle is identical with
24.
Neutron are found in atoms of all elements except in
25.
The nature of anode rays depends upon
26.
An electron is moving in Bohr's forth orbit.Its de-brogile wave length is λ what is the circumference of forth orbit.
27.
Rutherford scattering experiment is related to size of
28.
Penetration power of proton is
29.
An element has 8 electrons in the valence shell
30.
The ratio of charge and mass would be greater for
31.
6 Proton are found in nucleus of
32.
Nuclei tend to have more neutrons than protons at high mask numbers because
33.
A neutral atom ( Atomic number > 1 ) consist of
34.
The nucleus of the atom consist of
35.
The number of electron in the nucleus of -CONH2 is
36.
The atomic number of an element is 35 and mass number is 81 the number of electron in outermost Shell is
37.
Who discovered that cathode rays are made up of elecrtrons
38.
The Nucleus of helium contains
39.
The discovery of neutron becomes very late because
40.
The number of electron in one molecule of CO2
41.
Which one is the following has unit positive charge and one amu mass
43.
Which is not deflected by magnetic field.
44.
An elementary particle is
45.
lightest fundamental particle is
