## Which is colorless in aqueous solution?

Sc3+ has electron configuration of [Ar] 4s03d0. Therefore without any unpaired electrons it forms a colorless solution in aqueous medium.

## Is Ti2+ A Colour?

Ti2+ is coloured ion whereas ti4+ is colourless.

## Which ions exhibit Colour in aqueous solution?

Key Idea Colour is obtained as a consequence of d-d (or f-f) translation, and for d-d (or f-f) transition, presence of unpaired electrons is the necessary conditions. Hence, due to the presence of unpaired electron in Ti3+, it exhibit colour in aqueous solution.

## Which of the following will give Colour to an aqueous solution?

Predict which of the following will be coloured in aqueous solution? Ti3+, V3+, Cu+, Sc3+, Mn2+ , Fe3+ and Co2+ Give reason for each. Answer: Ti3+ (3d1), Mn2+ (3d5), Fe3+ (3d5), Co2+ (3d8) ions are coloured in aqueous solutions.

## Which one of the following ions is the most stable in aqueous solution?

Cr3+ ion is the most stable in aqueous solution on account of maximum crystal field stabilization energy.

## Why is Cu2+ more stable than Cu+?

Stability depends on the hydration energy (enthalpy) of the ions when they bond to the water molecules. The Cu2+ ion has a greater charge density than Cu+ ion and thus forms much stronger bonds releasing more energy.

## Which is more stable Mn2+ or mno4?

The answer can be given with the help of electronic configuration of the 2 ions. the EC of Mn*2 is (Ar)4s^1 3d^5 whereas Mn*4 EC is (Ar)3d^3. thus, Mn*2 has half filled d-orbitals which makes it more stable. Mn7+ is more stable than Mn2+.

## Why CR 3 is most stable in aqueous solution?

Cr3+is more stable in aqueous solution due to higher hydration energy which is due to smaller size and higher charge.

## Which is the most stable complex?

As C2O42− is a bidentate chelating ligand, it forms rings and hence [Fe(C2O4)3]3− is the most stable complex.

## How do you know which ion is the least stable?

Be− is the least stable ion. Be(Is22s2) has stable electronic configuration, addition of electron decreases stability.

## Which is more stable Li+ or Li?

Also Li atom is more stable than Li+. However, in aqueous medium, due to extremely large hydration energy (energy evolved when a substance is hydrolysed), in aqueous medium, Li+ is more stable.

Francium

## Why are all elements above 82 unstable?

When the mass number of the atom is greater than 82, the atoms are not stable because of the level of binding energy. The atom splits because of the force of repulsion between the particles and the new elements are formed as they reach the new configuration which is stable. …

## What is true of all elements above #82?

As a class, they are all radioactive. But that’s also true of all elements above atomic number 82 (lead) (Pb-208 being the heaviest stable isotope known). Uranium is also fissionable, and elements as light as atomic number 88 (radium) may undergo fission (but not very efficiently).

Fe

## Which nucleus is most stable?

Light nuclei are most stable if N=Z, while heavy nuclei are more stable if N>Z. (N→ number of neutrons, Z→ number of protons).

## What does a stable nucleus mean?

Nuclear stability means that nucleus is stable meaning that it does not spontaneously emit any kind of radiation. On the other hand, if the nucleus is unstable, it has the tendency of emitting some kind of radiation, which makes it radioactive.

## What causes a nucleus to be stable?

An atom is stable if the forces among the particles that makeup the nucleus are balanced. An atom is unstable (radioactive) if these forces are unbalanced; if the nucleus has an excess of internal energy. Instability of an atom’s nucleus may result from an excess of either neutrons or protons.

## Why the nucleus is stable?

The decay of free neutrons is energy feasible because the mass of a neutron is greater than the sum of the masses of the proton and electron it decays into. But where a neutron is paired with a proton its decay is not energy feasible and thus such neutrons within nuclei are stable.

## How do you make a nucleus stable?

A stable nucleus must have the right combination of protons and neutrons. Occurs if there are too many neutrons. A neutron to proton conversion occurs. This releases an electron or beta particle.