## What is the molecular orbital of lithium?

Of the four electrons in lithium and hydrogen, two are retained in the lithium 1s orbital, and the two remaining ones reside in the σ orbital that constitutes the Li–H covalent bond. The resulting molecule is 243 kJ/mole more stable than the parent atoms.

### What is the molecular orbital configuration and bond order for Li2?

The Diatomic Molecules of the Second Period

Molecule Electron Configuration Bond Order
Li2 (σ2s)2 1
Be2 (unstable) (σ2s)2(σ∗2s)2 0
B2 (σ2s)2(σ∗2s)2(π2py,π2pz)2 1
C2 (σ2s)2(σ∗2s)2(π2py,π2pz)4 2

#### What is the Li Li bond order in Li2 and in Li2 −?

Li2 + and Li2 – ions have the same bond order ( 0.5).

How many electrons does Li+ atom have?

2
However, in this question we are being asked the electrons in a lithium ion. Lithium, as a metal, donates electrons and so must have lost an ion in order to have a +1 charge. Therefore, the number of electrons must be 2.

What is the molecular orbital electron configuration of lithium molecule Mcq?

Explanation: The lithium molecule is denoted by Li2. When the lithium molecule is formed, each of the lithium shares an electron in the 2s orbital. Its electronic configuration is σ1s2σ*1s2σ2s2. So the number of electrons in bonding orbital and anti-bonding orbital of Lithium molecule are 4 and 2 respectively.

## What is the bond order of lithium?

The bonding and antibonding MOs formed from the 1s orbitals of the two atoms will have 2 electrons each. And the two electrons of the 2s orbitals will occupy the bonding MO, leaving the antibonding MO empty. Thus, there are altogether 4 bonding and 2 antibonding electrons. Bond order = 1/2(4-2) = 1.

### Is Li2 − paramagnetic or diamagnetic?

In this case, the number of unpaired electrons n =

Species (Molecules or ions) Total Number of electrons Magnetic Behavior
H2-,He2+ 3 Paramagnetic
He2, 4 Diamagnetic
Li2+,He2- 5 Paramagnetic
Li2, He22-, Be22+ 6 Diamagnetic

#### Is Li Li bond in Li2 stable?

Li2 is more stable than Li+2 , because the bond is (hypothetically) stronger (probably gas-phase). for each electron in a bonding MO, it adds 0.5 to the bond order, because more bonding character strengthens the bond…

What is molecular orbital energy diagram?

A molecular orbital diagram, or MO diagram, is a qualitative descriptive tool explaining chemical bonding in molecules in terms of molecular orbital theory in general and the linear combination of atomic orbitals (LCAO) method in particular.

What is the molecular orbital diagram of Li2 and Be2?

Molecular orbital diagram of Li2 & Be2: Number of electrons in Li2 molecule =6. Li2 = σ1s2,σ*1s2,σ2s2. Nb=4, Na=2. B.O = (Nb- Na).

## What is the bond order of Li2 in gas phase?

Li 2 is known in the gas phase. It has a bond order of 1, an internuclear separation of 267.3 pm and a bond energy of 102 kJ/mol or 1.06eV in each bond. The electron configuration of Li 2 may be written as σ 2 .

### Is Li2 ionic or covalent?

Dilithium, Li 2, is a strongly electrophilic, diatomic molecule comprising two lithium atoms covalently bonded together. Li 2 is known in the gas phase.

#### What is the MO diagram for Li2?

Consider the MO diagram for Li2. This is a bond between two lithium atoms, which have an electron configuration of. The last diagram presents the molecule dilithium (Li2). The 1s electrons do not take part in the bonding, but the 2s electrons fill the bonding orbital. The molecule .