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when an electron jumps from l to k shell1 energy is absorbed 2 energy is released 3 energy is sometimes absorbed and sometimes
when alpha -particles are sent through a thin metal foil most of them go straight through the foil because one or more are correct1 alpha
positronium consists of an electron and a positron a particle which has the same mass as an electron but opposite charge orbiting round their common
when atoms are bombarded with alpha particles only a few in n others pass out undeflected this is because1 the nucleus occupies much smaller
bohrs model can explain1 the spectrum of hydrogen atom only 2 spectrum of atom or ion containing one electron only 3 the spectrum of
rutherfords alpha particle scattering experiment eventually led to the conclusion that1the point of impact with matter can be precisely
rutherfords scattering experiment is related to the size of the1 nucleus 2 atom 3
rutherfords experiment on scattering of particles showed for the first time that the atom has1 electrons 2
which of the following is always a whole number1 atomic weight 2 atomic radii 3
number of neutrons in heavy hydrogen atom is1 0 2 1 3 2 4 3ans
the nitrogen atom has 7 protons and 7 electrons the nitride ion n3- will have1 7 protons and 10 electrons 2 4 protons and 7 electrons 3 4
six protons are found in the nucleus of1 boron 2 lithium 3 carbon 4 heliumans
which among the following species have the same number of electrons in its outermost as well as penultimate shell1
the compound in which cation is isoelectronic with anion is 1 nacl 2 csf
the nucleus of an element contains 9 protons its valency would be1 1 2 3 3
the atomic number of an element is 35 what is the total number of electrons present in all the p-orbitals of the ground state atom of that element1
tritium is the isotope of1 hydrogen 2 oxygen 3
the number of neutron in tritium is1 1 2 2 4 3 4 0ans
the number of electrons in cl- ion is1 19 2 20 3 18 4 35ans
which of the following are isoelectronic and isostructuralno-3 co2-3clo-3 so31 no-3 co2-3
which one of the following groupings represents a collection of isoelectronic species1 na ca2 mg2 2 n3 f- na3 be al3
the nucleus of tritium contains1 1 proton 1 neutron 2 1 proton 3
an element have atomic weight 40 and its electronic configuration is 1s2 2s2 2p6 3s2 3p6 then its atomic number and number of neutrons will be1 18
iso-electronic species is1 f-o-2 2 f-
the charge of an electron is -16 x10-19c the value of free charge on li ion will be1 36x 10-19c