Which of the following given statement(s) islare incorrect? (a) There are five unpaired electrons in (n - 1)d subshell of Fe3+ - (b) The number of nodal planes in 4d, orbital is one. (c) In Ag atom, 23 electrons have a spin of one type and 24 of the opposite type. (1) (b) & (C) (2) Only (b) (3) Only (c) (4) Only (a)
Answers
Answer:
2) Only b is incorrect.
Explanation:
a) Electronic configuration of Fe(Iron) is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶ 4s². Hence removing 3 electrons produces Fe(3+) and configuration becomes 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵.Thus there are 5 unpaired electrons in (n-1)d subshell.
b) Nodal planes are regions where the probability of finding an electron is zero, around the atomic nuclei. There are five 4d orbitals. They are 4dxy, 4dxz, 4dyz, 4dx2-y2, and 4dz2. Unless the orbital is not specified we cant answer the number of nodal planes.
c) The Atomic number of silver is 47. Hence there are 47 electrons in its native state. Out of which 23 electrons have one spin type and the rest have 24 will have an opposite spin type. The 23(+1/2) spin will cancel out the 23 (-1/2) spin type, and the one unpaired electron in the atom will determine the spin.
In this case a) and b) are true. Hence according to the options given, the probable answer is option 2) - Only (b)