1.
Number of electrons in the outermost orbit of the element of atomic number 15 is
2.
Which of the following particle have more electron than Neutron
3.
Atom was discovered by
5.
An elementary particle is
6.
What is the ratio of mass of an electron to the mass of proton
7.
The number of electron in the nucleus of Cl is
8.
Anode rays were discovered by
9.
An element has 8 electrons in the valence shell
10.
Neutron are found in atoms of all elements except in
11.
Which one is the following has unit positive charge and one amu mass
12.
The number of neutron in heavy hydrogen atom is
13.
Rutherford scattering experiment is related to size of
16.
Penetration power of proton is
17.
Which is not deflected by magnetic field.
18.
Nuclei tend to have more neutrons than protons at high mask numbers because
19.
The atomic number of an element is 35 and mass number is 81 the number of electron in outermost Shell is
20.
The nature of anode rays depends upon
21.
The number of electron in the nucleus of -CONH2 is
22.
The mass of an atom is constituted mainly by
23.
The proton and neutron are collectively called as
24.
Who discovered that cathode rays are made up of elecrtrons
25.
Positive ions are formed from the neutral atom by the
26.
Electromagnetic radiation with maximum wave length is
27.
The nucleus of the atom consist of
28.
An electron is moving in Bohr's forth orbit.Its de-brogile wave length is λ what is the circumference of forth orbit.
29.
The Nucleus of helium contains
30.
Rutherford experiment prove
31.
α particle is identical with
32.
Nuclear theory of atom was put forward by
33.
The discovery of neutron becomes very late because
34.
The fundamental particles present in the nucleus of an atom are
35.
Who discovered neutron ?
36.
alpha particles are represented by
37.
lightest fundamental particle is
38.
The number of electron in the nucleus of C12 is
39.
6 Proton are found in nucleus of
40.
The number of electron in one molecule of CO2
41.
Proton was discovered by
42.
Number of unpaired electrons in inert gas is
43.
Mass of neutron is approximately.............. times of mass of electron
44.
The ratio of charge and mass would be greater for
45.
A neutral atom ( Atomic number > 1 ) consist of
