WHY He2 is not possible?

There is no bond existing between atoms of He2. So He2 does not exist.

Why formation of He2 is not possible?

Answer. Because He is an inert gas, which means it won't react. This means there's no bond in He2, which concludes it doesn't exists.

Why He2 is not possible by VBT?

Answer. Each helium atom has two electrons in 1s-orbital and therefore, there are four electrons in He2 molecule. These electrons will be accommodated in si1ls and s*1s MOs as shown below. The zero bond order value indicates that there is no net bonding and He2 molecule should not be formed.

How can you can say that He2 does not exist?

He2 does not exist because it has filled octets and its valency is zero. Because it has no combining capacity, it exists as a monoatomic molecule like He. The electrical configuration of the helium atom is 1s2.

Does He2 plus exist?

Hence, He cannot exist. The molecular orbital diagram is given below: He₂⁺ contains 3 electrons. Out of these 3 electrons, 2 are present in the σ level and the remaining one is present in the σ* 1s level.

He2 doesn't exist ? Explain.

Why does helium molecule not exist?

When two helium atoms come closer, the force of repulsion is more than the force of attraction, which decreases the stability. The bond order of the helium molecule is zero following the molecular orbital theory. So, no bond can exist between two helium atoms and the helium molecule does not exist.

Can helium exist as He2?

He2 doesn't exist because helium is a noble gas. They are already stable, they don't lose or gain electrons to become stable. So, He2 is not possible to exist.

Why does H2 exist but He2 does not?

there are 2 electrons in 1s sigma bonding molecular orbital in case of H2 molecule…so H2 molecule exist but in case of He2 as there are 2 electrons in sigma 1s bonding molecular orbital and 2 electrons in sigma 1s antibonding molecular orbital..so bond order is 2_2/2=0..so He2 molecule does not exist..

Which of the following statement is incorrect He2 does not exist?

He2 does not exist because its bond order is zero. 2. O2,O−2 and O+2 are all paramagnetic. 3.

Why does He2+ exist whereas He2 does not?

Expert-verified answer

The number of electrons in is 4. When bond order is 0, such a molecule does not exist. The bond order is not equal to 0, hence this molecule exists. Therefore, exists while does not exist.

Is He2 diamagnetic or paramagnetic?

Let it be H2- ,H2+ or He2+ ; there's an unpaired electron i.e, they are paramagnetic.

Why He does not exist in diatomic state?

There is no bond existing between atoms of He2. So He2 does not exist.

What is the bond order of He2?

The bond order of He2+ is 1/2. He2+ has 3 electrons. Hence, Bond order = (2-1)/2 = 1/2 = 0.5. To learn more chemistry-related questions, visit BYJU'S – The Learning App.

Which of the following molecule does not exist due to its zero bond order H2+ He2+ He2 H2?

Answer. He2 does not exist because it has same number of electrons in bonding and anti bonding molecular orbital due to which its bond order is zero. But H2 has w electrons in bonding molecular orbital and no electron in anti bonding which gives its bond order as 1.

Which molecule does not exist due to its zero bond order?

"He2 does not exist since its bond-order is zero."

Is solid helium possible?

Helium is the only substance that can maintain its liquid state at near absolute zero and has no triple point. Solid helium can be obtained only under high-pressure conditions (at T<1.0 K, the pressure must be higher than 2500 kPa to obtain solid He_II or higher than 3000 kPa for He_I).

How many protons does He2+ ion possess?

He²⁺ ion has 2 protons. Helium has 2 protons and 2 electrons, When it loses 2 electrons, it becomes Helium ion (also called alpha particle) or He²⁺.

How many electrons are in He2 bonding orbital?

There are 6 sulfur valence electrons to accommodate and 6 × 1 = 6 fluorine electrons for a total of 12. The first 10 of these electrons occupy the net bonding orbitals; the remaining two occupy the lowest-energy antibonding orbital.

What is not paramagnetic?

Cl− ion is not paramagnetic. It is dimagnetic as all electrons are paired. It has electronic configuration [Ne]3s23p6.

Why H2 is stable and He2 is unstable?

It means 2 electrons are in bonding molecular orbitals and 2 are in antibonding molecular orbitals . Since the bond order is zero so that He2 molecule does not exist.

What is the magnetic Behaviour of He2 molecule?

Seeing the electronic configuration, there is one unpaired electron present in the antibonding orbital. Hence $ H{e_2}^ + $ is paramagnetic.

Is helium diamagnetic or paramagnetic?

We have two electrons and they must be spin paired. Right so the electrons are completely paired and that means that helium is diamagnetic. Helium is diamagnetic.

Is He2 more stable than H2?

Answer. H2+ will be more stable than He2+ because while they both have same bond order, He2+ has anti bonding electrons which destabilizes the molecule.

Does HHE exist?

Neutral molecule

Unlike the helium hydride ion, the neutral helium hydride molecule HeH is not stable in the ground state. However, it does exist in an excited state as an excimer (HeH*), and its spectrum was first observed in the mid-1980s.