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A hypothetical ion of element `X` with mass number `40`, posses `2` units of positive charge and `23%` more neutrons than electrons. Symbol of the ion is :A. `._(20)^(40)X^(+2)`B. `._(19)^(40)X^(+2)`C. `._(18)^(40)X^(+2)`D. None of these |
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Answer» Correct Answer - B A hydrothetical ion of ……… `._(z)^(40)X^(2+)` `n=e+(23)/(100)e` , & `n = 40 -z` or `n=40-(e+2)` or `n=40-(e+2)` `40-(e+2)=e+(23)/(100)e` `40 = (123 e)/(100)+e+2` `40-2 = (223 e)/(100)` `e=17` , `z=19` , or `n=21` |
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