Lanthanides are

Question

Lanthanides are (A) 14 elements in the sixth period (atomic no. = 90 to 103) that are filling 4f sub-level (B) 14 elements in the seventh period (atomic no. = 90 to 103) that are filling 5f sub-level (C) 14 elements in the sixth period (atomic no.= 58 to 71) that are filling 4f sub-level (D) 14 elements in the seventh period (atomic no. = 58 to 71) that are filling 4f sub-level

Tardigrade Admin · Accepted Answer

Lanthanides are the 14 elements of IIIB group and sixth period ( At. no. = 58 to 71 ) that are filling 4 f sub-shell of antipenultimate shell from 1 to 14. Actually, they are placed below the periodic table in horizontal row as lanthanide series.

Q. Lanthanides are

14 elements in the sixth period (atomic no. = 90 to 103) that are filling 4f sub-level

14 elements in the seventh period (atomic no. = 90 to 103) that are filling 5f sub-level

14 elements in the sixth period (atomic no.= 58 to 71) that are filling 4f sub-level

14 elements in the seventh period (atomic no. = 58 to 71) that are filling 4f sub-level

Lanthanides are the $14$ elements of IIIB group and sixth period ( At. no. = $58$ to $71$ ) that are filling $4 f$ sub-shell of antipenultimate shell from $1$ to $14$ . Actually, they are placed below the periodic table in horizontal row as lanthanide series.

Q. Lanthanides are

14 elements in the sixth period (atomic no. = 90 to 103) that are filling 4f sub-level

14 elements in the seventh period (atomic no. = 90 to 103) that are filling 5f sub-level

14 elements in the sixth period (atomic no.= 58 to 71) that are filling 4f sub-level

14 elements in the seventh period (atomic no. = 58 to 71) that are filling 4f sub-level

Lanthanides are the 14 elements of IIIB group and sixth period ( At. no. = 58 to 71 ) that are filling 4f sub-shell of antipenultimate shell from 1 to 14. Actually, they are placed below the periodic table in horizontal row as lanthanide series.

Lanthanides are the $14$ elements of IIIB group and sixth period ( At. no. = $58$ to $71$ ) that are filling $4 f$ sub-shell of antipenultimate shell from $1$ to $14$ . Actually, they are placed below the periodic table in horizontal row as lanthanide series.