321700
The number of f-electrons in \({\mathrm{\mathrm{Ho}^{2+}}}\) ion is ____ . [At. no. of \({\mathrm{\mathrm{Ho}=67]}}\)
1 14
2 11
3 13
4 12
Explanation:
Electronic configuration of Ho is: \({\mathrm{\left[\right.}}\) Xe] \({\mathrm{4 \mathrm{f}^{11} 6 \mathrm{~s}^{2}}}\). \({\mathrm{\therefore \mathrm{Ho}^{2+}}}\) ion \({\mathrm{\Rightarrow[\mathrm{Xe}] 4 \mathrm{f}^{11}}}\) \({\mathrm{\therefore}}\) No. of f-electrons \({\mathrm{=11}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS
321701
Lanthanides are
1 14 elements in the sixth period (atomic number \(=90\) to 103 ) that are filling 4f- sub-level
2 14 elements in the seventh period (atomic number \(=90\) to 103 ) that are filling 5f sub-level
3 14 elements in the sixth period (atomic number \(=58\) to 71) that are filling 4f sub-level
4 14 elements in the seventh period (atomic number \(=58\) to 71 ) that are filling 4f sub-level
Explanation:
Lanthanides are the 14 elements of III B group and sixth period (atomic number \(=58\) to 71) that are filling 4f-subshell of antipenultimate shell from 1 to 14. Actually, they are placed below the periodic table in horizontal row as lanthanide series.
CHXII08:THE D- & F-BLOCK ELEMENTS
321702
General electronic configuration of lanthanides is
1 \(\mathrm{(n-2) f^{1-14}(n-1) d^{0-1} n s^{2}}\)
2 \(\mathrm{(n-2) f^{0-14}(n-1) d^{0-1} n s^{2}}\)
3 \(\mathrm{(n-2) f^{0-14}(n-1) d^{10} n s^{2}}\)
4 \(\mathrm{(n-2) f^{0-1}(n-1) f^{1-14} n s^{2}}\)
Explanation:
General electronic configuration of lanthanides is \({\rm{(n - 2)}}{{\rm{f}}^{{\rm{1 - 14}}}}{\rm{(n - 1)}}{{\rm{d}}^{{\rm{0 - 1}}}}{\rm{n}}{{\rm{s}}^{\rm{2}}}\)
NCERT Exemplar
CHXII08:THE D- & F-BLOCK ELEMENTS
321703
The electronic configuration of \(\mathrm{G d^{2+}}\) is (at.no.of \(\mathrm{\mathrm{Gd}}\) is 64)
321700
The number of f-electrons in \({\mathrm{\mathrm{Ho}^{2+}}}\) ion is ____ . [At. no. of \({\mathrm{\mathrm{Ho}=67]}}\)
1 14
2 11
3 13
4 12
Explanation:
Electronic configuration of Ho is: \({\mathrm{\left[\right.}}\) Xe] \({\mathrm{4 \mathrm{f}^{11} 6 \mathrm{~s}^{2}}}\). \({\mathrm{\therefore \mathrm{Ho}^{2+}}}\) ion \({\mathrm{\Rightarrow[\mathrm{Xe}] 4 \mathrm{f}^{11}}}\) \({\mathrm{\therefore}}\) No. of f-electrons \({\mathrm{=11}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS
321701
Lanthanides are
1 14 elements in the sixth period (atomic number \(=90\) to 103 ) that are filling 4f- sub-level
2 14 elements in the seventh period (atomic number \(=90\) to 103 ) that are filling 5f sub-level
3 14 elements in the sixth period (atomic number \(=58\) to 71) that are filling 4f sub-level
4 14 elements in the seventh period (atomic number \(=58\) to 71 ) that are filling 4f sub-level
Explanation:
Lanthanides are the 14 elements of III B group and sixth period (atomic number \(=58\) to 71) that are filling 4f-subshell of antipenultimate shell from 1 to 14. Actually, they are placed below the periodic table in horizontal row as lanthanide series.
CHXII08:THE D- & F-BLOCK ELEMENTS
321702
General electronic configuration of lanthanides is
1 \(\mathrm{(n-2) f^{1-14}(n-1) d^{0-1} n s^{2}}\)
2 \(\mathrm{(n-2) f^{0-14}(n-1) d^{0-1} n s^{2}}\)
3 \(\mathrm{(n-2) f^{0-14}(n-1) d^{10} n s^{2}}\)
4 \(\mathrm{(n-2) f^{0-1}(n-1) f^{1-14} n s^{2}}\)
Explanation:
General electronic configuration of lanthanides is \({\rm{(n - 2)}}{{\rm{f}}^{{\rm{1 - 14}}}}{\rm{(n - 1)}}{{\rm{d}}^{{\rm{0 - 1}}}}{\rm{n}}{{\rm{s}}^{\rm{2}}}\)
NCERT Exemplar
CHXII08:THE D- & F-BLOCK ELEMENTS
321703
The electronic configuration of \(\mathrm{G d^{2+}}\) is (at.no.of \(\mathrm{\mathrm{Gd}}\) is 64)
321700
The number of f-electrons in \({\mathrm{\mathrm{Ho}^{2+}}}\) ion is ____ . [At. no. of \({\mathrm{\mathrm{Ho}=67]}}\)
1 14
2 11
3 13
4 12
Explanation:
Electronic configuration of Ho is: \({\mathrm{\left[\right.}}\) Xe] \({\mathrm{4 \mathrm{f}^{11} 6 \mathrm{~s}^{2}}}\). \({\mathrm{\therefore \mathrm{Ho}^{2+}}}\) ion \({\mathrm{\Rightarrow[\mathrm{Xe}] 4 \mathrm{f}^{11}}}\) \({\mathrm{\therefore}}\) No. of f-electrons \({\mathrm{=11}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS
321701
Lanthanides are
1 14 elements in the sixth period (atomic number \(=90\) to 103 ) that are filling 4f- sub-level
2 14 elements in the seventh period (atomic number \(=90\) to 103 ) that are filling 5f sub-level
3 14 elements in the sixth period (atomic number \(=58\) to 71) that are filling 4f sub-level
4 14 elements in the seventh period (atomic number \(=58\) to 71 ) that are filling 4f sub-level
Explanation:
Lanthanides are the 14 elements of III B group and sixth period (atomic number \(=58\) to 71) that are filling 4f-subshell of antipenultimate shell from 1 to 14. Actually, they are placed below the periodic table in horizontal row as lanthanide series.
CHXII08:THE D- & F-BLOCK ELEMENTS
321702
General electronic configuration of lanthanides is
1 \(\mathrm{(n-2) f^{1-14}(n-1) d^{0-1} n s^{2}}\)
2 \(\mathrm{(n-2) f^{0-14}(n-1) d^{0-1} n s^{2}}\)
3 \(\mathrm{(n-2) f^{0-14}(n-1) d^{10} n s^{2}}\)
4 \(\mathrm{(n-2) f^{0-1}(n-1) f^{1-14} n s^{2}}\)
Explanation:
General electronic configuration of lanthanides is \({\rm{(n - 2)}}{{\rm{f}}^{{\rm{1 - 14}}}}{\rm{(n - 1)}}{{\rm{d}}^{{\rm{0 - 1}}}}{\rm{n}}{{\rm{s}}^{\rm{2}}}\)
NCERT Exemplar
CHXII08:THE D- & F-BLOCK ELEMENTS
321703
The electronic configuration of \(\mathrm{G d^{2+}}\) is (at.no.of \(\mathrm{\mathrm{Gd}}\) is 64)
321700
The number of f-electrons in \({\mathrm{\mathrm{Ho}^{2+}}}\) ion is ____ . [At. no. of \({\mathrm{\mathrm{Ho}=67]}}\)
1 14
2 11
3 13
4 12
Explanation:
Electronic configuration of Ho is: \({\mathrm{\left[\right.}}\) Xe] \({\mathrm{4 \mathrm{f}^{11} 6 \mathrm{~s}^{2}}}\). \({\mathrm{\therefore \mathrm{Ho}^{2+}}}\) ion \({\mathrm{\Rightarrow[\mathrm{Xe}] 4 \mathrm{f}^{11}}}\) \({\mathrm{\therefore}}\) No. of f-electrons \({\mathrm{=11}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS
321701
Lanthanides are
1 14 elements in the sixth period (atomic number \(=90\) to 103 ) that are filling 4f- sub-level
2 14 elements in the seventh period (atomic number \(=90\) to 103 ) that are filling 5f sub-level
3 14 elements in the sixth period (atomic number \(=58\) to 71) that are filling 4f sub-level
4 14 elements in the seventh period (atomic number \(=58\) to 71 ) that are filling 4f sub-level
Explanation:
Lanthanides are the 14 elements of III B group and sixth period (atomic number \(=58\) to 71) that are filling 4f-subshell of antipenultimate shell from 1 to 14. Actually, they are placed below the periodic table in horizontal row as lanthanide series.
CHXII08:THE D- & F-BLOCK ELEMENTS
321702
General electronic configuration of lanthanides is
1 \(\mathrm{(n-2) f^{1-14}(n-1) d^{0-1} n s^{2}}\)
2 \(\mathrm{(n-2) f^{0-14}(n-1) d^{0-1} n s^{2}}\)
3 \(\mathrm{(n-2) f^{0-14}(n-1) d^{10} n s^{2}}\)
4 \(\mathrm{(n-2) f^{0-1}(n-1) f^{1-14} n s^{2}}\)
Explanation:
General electronic configuration of lanthanides is \({\rm{(n - 2)}}{{\rm{f}}^{{\rm{1 - 14}}}}{\rm{(n - 1)}}{{\rm{d}}^{{\rm{0 - 1}}}}{\rm{n}}{{\rm{s}}^{\rm{2}}}\)
NCERT Exemplar
CHXII08:THE D- & F-BLOCK ELEMENTS
321703
The electronic configuration of \(\mathrm{G d^{2+}}\) is (at.no.of \(\mathrm{\mathrm{Gd}}\) is 64)
