Mercurous ion is written as `Hg_(2)^(2+)` whereas cuprous ion is writt – InterviewSolution

InterviewSolution

1.	Mercurous ion is written as `Hg_(2)^(2+)` whereas cuprous ion is written as `Cu^(+)` . Explain.
Answer» `""_(80)Hg:[Xe]4f^(14)5d^(10)6s^(2),Hg^(+)[Xe]4f^(14)5d^(10)6s^(1)` In `Hg^(+)` ion, there is one unpaired electron and `Hg^(+)` (mercurous) salts are expected to be paramagnetic. But the magnetic moment of mercurous salts is zero which indicates that they are diamagnetic in nature. This is possible in case 6s electron has neenn used by two Hg atoms in bonding. Therefore, mercurous ion is `Hg^(2)^(2+)`. `""_(29)Cu:[Ar]3d^(10)4s^(1),Cu^(+):[Ar]3d^(10)`. In `Cu^(+)` ion, there is no unpaired electrons and `Cu^(+)` (cuprous) salts are expected to be diamagnetic. These are actually so. Therefore, cuprous ion is written as `Cu^(+)`.

Discussion

No Comment Found

Related InterviewSolutions

Lanthanide series start from the elements with atomic numberA. 27 to 71B. 58 to 71C. 56 to 70D. 60 to 74
The correct order of ionic radii of `Y^(3+), La ^(3+), Eu ^(3+) and Lu ^(3+)` isA. `Y^(3+) lt Lu ^(3+) lt Eu ^(3+) lt La ^(3+)`B. `La ^(3+) lt Eu ^(3+) lt Lu ^(3+) lt Y^(3+)`C. `Lu ^(3+), lt Eu ^(3+) lt La ^(3+) lt Y ^(3+)`D. `Y ^(3+) lt La ^(3+)lt Lu ^(3+) lt Eu^(3+)`
Lanthanide contraction is due to increase inA. iionic radiiB. shielding of 4f electronsC. effective nuclear chargeD. size of 4f orbitals
Lanthanide contraction is related toA. valence electronB. ionic radiiC. densitiesD. nuclear mass of various membere of the series
The steady decrease in atomic size in lanthanide series is called lanthanide confraction and in all amounts toA. 150 PmB. `10 Pm`C. `20 Pm`D. `40 Pm`
Lanthanide contraction is due to increase inA. shielding of 4f electronsB. effective nuclear chargeC. atomic numberD. size of 4f orbital
Lanthanide contraction due toA. poor shielding of 5f orbitalsB. poor shielding of 3f orbitalsC. prerfect shielding of 4f orbitalsD. poor shielding of 4f orbitals
The lanthanide contraction is responsible for the fact thatA. Zr and Yb have same sizeB. Zr and Nb have same oxidation sateC. Zr and Hf have same radiusD. Zr and Zn have same oxidation state
The most characteristic oxidation state of lanthanide isA. `+2`B. `+3`C. `+4`D. `+6`
Name a member of lanthanide series which is well known to exhibit `+4` oxidation state `,`A. CeB. LaC. LuD. Pr