1.
Nuclei tend to have more neutrons than protons at high mask numbers because
2.
Number of electrons in the outermost orbit of the element of atomic number 15 is
3.
α particle is identical with
4.
An electron is moving in Bohr's forth orbit.Its de-brogile wave length is λ what is the circumference of forth orbit.
5.
An element has 8 electrons in the valence shell
6.
Rutherford scattering experiment is related to size of
7.
Mass of neutron is approximately.............. times of mass of electron
8.
Anode rays were discovered by
9.
Proton was discovered by
11.
Which one is the following has unit positive charge and one amu mass
12.
The number of electron in the nucleus of -CONH2 is
13.
Atom was discovered by
15.
6 Proton are found in nucleus of
16.
An elementary particle is
17.
Nuclear theory of atom was put forward by
18.
Who discovered neutron ?
19.
Penetration power of proton is
20.
The ratio of charge and mass would be greater for
21.
The number of electron in one molecule of CO2
22.
The fundamental particles present in the nucleus of an atom are
23.
The Nucleus of helium contains
24.
The proton and neutron are collectively called as
25.
What is the ratio of mass of an electron to the mass of proton
26.
A neutral atom ( Atomic number > 1 ) consist of
27.
Electromagnetic radiation with maximum wave length is
28.
lightest fundamental particle is
30.
Neutron are found in atoms of all elements except in
31.
Rutherford experiment prove
32.
The nature of anode rays depends upon
33.
The discovery of neutron becomes very late because
34.
Who discovered that cathode rays are made up of elecrtrons
35.
Number of unpaired electrons in inert gas is
36.
The atomic number of an element is 35 and mass number is 81 the number of electron in outermost Shell is
37.
The nucleus of the atom consist of
38.
alpha particles are represented by
39.
The number of electron in the nucleus of Cl is
40.
The mass of an atom is constituted mainly by
41.
Which of the following particle have more electron than Neutron
42.
Which is not deflected by magnetic field.
43.
Positive ions are formed from the neutral atom by the
44.
The number of neutron in heavy hydrogen atom is
45.
The number of electron in the nucleus of C12 is
