which element needs 3 e- to complete its valence shell? Ba,Ca, Si, P, Cl total n

Question

which element needs 3 e- to complete its valence shell? Ba,Ca, Si, P, Cl total number of e- that can accommodated in the n=5 shell is :2, 18, 32,50 list in order of increasing size: Sr, Ca, Mg, Be list in order of increasing ionization energy: F, C, Na, O,Li which element needs 3 e- to complete its valence shell? Ba,Ca, Si, P, Cl total number of e- that can accommodated in the n=5 shell is :2, 18, 32,50 list in order of increasing size: Sr, Ca, Mg, Be list in order of increasing ionization energy: F, C, Na, O,Li

Explanation / Answer

WE Know that :    The element which has the general valency as 3 isP so phosphorus require three more electrons to attain the octetconfiguration.       Number of electrons in 5 thshell of an atom is 2 ( n )2                                                                           = 2 ( 5 )2                                                                            = 50 electrons          The order ofincreasing atomic size of the elements is : Be< Mg <Ca<Sr       The order of increasingIonization energy is Na< Li< C<O<F                                                                            = 50 electrons          The order ofincreasing atomic size of the elements is : Be< Mg <Ca<Sr       The order of increasingIonization energy is Na< Li< C<O<F

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