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71) Which of the following has the longest wave length?
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72) Which electromagnetic radiation is emitted by radioactive substances
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73) Na+ ion is iso electronic with
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74) Neutrino has
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75) The number of neutrons in dipositive zine ion (Zn2+, mass number 70 and atomic number 30) is
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76) Which of the properties of the elements is a whole number ?
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77) The charge on position is equal to the charge on
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78) Discovery of the nucleus of an atom was due to the experiment carried out by
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79) Discovery of the nucleus of an atom was due to the experiment carried out by
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80) CN- ion is isoelectronic with
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