CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313433
For \({\rm{Be,}}\,\,{{\rm{Z}}_{{\rm{eff}}}}{\rm{ = 1}}{\rm{.95}}\,\,{\rm{and}}\,\,{\rm{for}}\,\,{\rm{B}}{{\rm{e}}^{{\rm{x + }}}}{\rm{,}}\,\,{{\rm{Z}}_{{\rm{eff}}}}{\rm{ = 2}}{\rm{.30}}{\rm{.}}\) Hence ion is
1 \({\rm{B}}{{\rm{e}}^{\rm{ + }}}\)
2 \({\rm{B}}{{\rm{e}}^{{\rm{2 + }}}}\)
3 \({\rm{B}}{{\rm{e}}^{{\rm{3 + }}}}\)
4 \({\rm{B}}{{\rm{e}}^{\rm{0}}}\)
Explanation:
Effective nuclear charge \({{\rm{Z}}_{{\rm{eff}}}}{\rm{ = Z - S}}\) where Z = atomic number and S = screening constant \({\rm{B}}{{\rm{e}}^{\rm{ + }}}{\rm{ = 1}}{{\rm{s}}^{{\rm{2}}\,}}{\rm{2}}{{\rm{s}}^{\rm{2}}}\) 2s-electron is screened by two electrons in 1s-orbital i.e., (n-1) th orbital) \({\rm{S = 2 \times 0}}{\rm{.85 = 1}}{\rm{.70}}\) \({{\rm{Z}}_{{\rm{eff}}}}{\rm{ = 4 - 1}}{\rm{.70 = 2}}{\rm{.30}}\)
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313433
For \({\rm{Be,}}\,\,{{\rm{Z}}_{{\rm{eff}}}}{\rm{ = 1}}{\rm{.95}}\,\,{\rm{and}}\,\,{\rm{for}}\,\,{\rm{B}}{{\rm{e}}^{{\rm{x + }}}}{\rm{,}}\,\,{{\rm{Z}}_{{\rm{eff}}}}{\rm{ = 2}}{\rm{.30}}{\rm{.}}\) Hence ion is
1 \({\rm{B}}{{\rm{e}}^{\rm{ + }}}\)
2 \({\rm{B}}{{\rm{e}}^{{\rm{2 + }}}}\)
3 \({\rm{B}}{{\rm{e}}^{{\rm{3 + }}}}\)
4 \({\rm{B}}{{\rm{e}}^{\rm{0}}}\)
Explanation:
Effective nuclear charge \({{\rm{Z}}_{{\rm{eff}}}}{\rm{ = Z - S}}\) where Z = atomic number and S = screening constant \({\rm{B}}{{\rm{e}}^{\rm{ + }}}{\rm{ = 1}}{{\rm{s}}^{{\rm{2}}\,}}{\rm{2}}{{\rm{s}}^{\rm{2}}}\) 2s-electron is screened by two electrons in 1s-orbital i.e., (n-1) th orbital) \({\rm{S = 2 \times 0}}{\rm{.85 = 1}}{\rm{.70}}\) \({{\rm{Z}}_{{\rm{eff}}}}{\rm{ = 4 - 1}}{\rm{.70 = 2}}{\rm{.30}}\)
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313433
For \({\rm{Be,}}\,\,{{\rm{Z}}_{{\rm{eff}}}}{\rm{ = 1}}{\rm{.95}}\,\,{\rm{and}}\,\,{\rm{for}}\,\,{\rm{B}}{{\rm{e}}^{{\rm{x + }}}}{\rm{,}}\,\,{{\rm{Z}}_{{\rm{eff}}}}{\rm{ = 2}}{\rm{.30}}{\rm{.}}\) Hence ion is
1 \({\rm{B}}{{\rm{e}}^{\rm{ + }}}\)
2 \({\rm{B}}{{\rm{e}}^{{\rm{2 + }}}}\)
3 \({\rm{B}}{{\rm{e}}^{{\rm{3 + }}}}\)
4 \({\rm{B}}{{\rm{e}}^{\rm{0}}}\)
Explanation:
Effective nuclear charge \({{\rm{Z}}_{{\rm{eff}}}}{\rm{ = Z - S}}\) where Z = atomic number and S = screening constant \({\rm{B}}{{\rm{e}}^{\rm{ + }}}{\rm{ = 1}}{{\rm{s}}^{{\rm{2}}\,}}{\rm{2}}{{\rm{s}}^{\rm{2}}}\) 2s-electron is screened by two electrons in 1s-orbital i.e., (n-1) th orbital) \({\rm{S = 2 \times 0}}{\rm{.85 = 1}}{\rm{.70}}\) \({{\rm{Z}}_{{\rm{eff}}}}{\rm{ = 4 - 1}}{\rm{.70 = 2}}{\rm{.30}}\)
