1.
Anode rays were discovered by
A
J. Stoney
B
Rutherford
C
Goldstein
D
J J Thomson
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Anode rays were discovered by
J. Stoney
Rutherford
Goldstein
J J Thomson
an aluminium isotope consists of 13 protons, 13 electrons and 14 neutrons. Its mass numbers is
40
13
14
27
Quantum number value for 2p sub shell are
n = 2, L = 0
n = 2, L = 1
n = 1, L = 0
n = 1, L = 1
Nucleus of most of the atoms is composed of
tightly packed neutrons
tightly packed protons
tightly packed protons and neutrons
tightly packed electrons
The maximum number of. electrons that can be accommodated by p - orbital is
2
6
10
14
A nuclear particle that has same mass that of a proton, but no electrical charge is
nuclide
electron
proton
isotope
What did Rutherford conclude about the structure of the atom
an tom is individual
electrons makes up the center of the atom
an atom carries a positive charge
an atom contains a small, dense, positively charged central region
Principle quantum number describes
size of the orbital
shape of the orbital
spin of the orbital
orientation of the orbital
The gold foil experiment led to the discovery of
cathode ray
electron
neutron
proton
Which of the following statement Is wrong about electron
It is a particle
Its motion is affected by magnetic field
It has wave like property
It emits energy while moving in orbit
In the gold foil experiment, most of the particles fired at the foil
bounced back
were absorbed by the foil
passed through the foil
combined at the foil
Who explained the behavior of positively charged particles being deflected from a metal fousceil as the nucleus
Ernest Rutherford
James Chadwick
John Dalton
Niels Bohr
Electromagnetic radiations produced from nuclear reactions are
alpha rays
beta rays
gama rays
x rays
Experimentation with cathode ray led to the discovery of
electron
proton
neutron
nucleus
Atomic mass of an element is equal to
mass of electron
mass of neutron
the sum of mass of proton and neutron
the sum of mass of electron and proton
Who first proposed the atomic theory based on scientific knowledge
John Dalton
Robert Brown
Jones Berzelius
Dmitri Mendeleev
Who discovered Neutrons?
Dalton
J J Thomson
Chadwick
Daraday