There are four atoms A,B, C and D with atomic numbers 9,11,13 and 15 respectively. The atom containing less than 8 electrons in the second or L - shell is1) A2) B3) C4) D
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What determines the number of positive charge in the nucleus1) No. of electrons removed2) Ratio of protons to neutrons3) The number of protons4) The electropositive character of the atom
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The fundatmental particles present in a neutral atom which are equal is number are1) Positron and electrons2) Proton and electron3) Neutrino and electron4) Proton and neutron
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The nucleus of hydrogen atom is called1) Positron2) Neutron3) Proton4) Electron
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The idea of fixed energy levels in an atom was given by1) E Rutherford2) R.A Mullikan3) schrodinger4) Neils Bohr
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E. Rutherford discovered1) proton2) neutron3) nucleus4) orbits
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Outermost shell of an atom cannot accommodate more electrons than1) 22) 83) 184) 16
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When one neutron disintegrates, it produces1) One proton and one electron2) One proton only3) One proton and one neutron4) One electron and one neutron
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The charge to mass ratio on cathode rays in the discharge tube is constant because ………… are common constituents of all matter.1) electrons2) protons3) neutrons4) positrons