How many bonds (bond order) does B₂ have ?

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4.Chemical Bonding and Molecular Structure

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How many bonds (bond order) does $B_2$ have ?

$0$

$1$

$2$

$3$

Solution

The $B _2$ molecule is known to be formed by the combination of two Boron atoms, where they are linked by a covalent bond.

The atomic number of boron is $5$ , for which the electronic configuration of boron can be given as: $1 s^2\, 2 s^2\, 2 p^1$

The molecular orbital diagram for $B _2$ molecule can be shown as:

From the diagram, we can know that the number of electrons in bonding molecular orbitals is $4$ whereas the number of electrons in antibonding molecular orbitals is $2.$

Hence, the bond order is calculated as:

Bond order $=\frac{1}{2}(4-2)$

$=1$

Standard 11

Chemistry

In which of the following transformations, the bond order has increased and the magnetic behaviour has changed ?

medium

Match List$-I$ with List$-II.$

List$-I$ List$-II$

$(a)$ $Ne _{2}$ $(i)$ $1$

$(b)$ $N _{2}$ $(ii)$ $2$

$(c)$ $F _{2}$ $(iii)$ $0$

$(d)$ $O _{2}$ $(iv)$ $3$

Choose the correct answer from the options given below:

easy

(JEE MAIN-2021)

Which of the following contains $(2C -1e^-)$ bond

medium

In which of the following pairs the two molecules have identical bond order

medium

The number of species from the following which are paramagnetic and with bond order equal to one is___________

$\mathrm{H}_2, \mathrm{He}_2^{+}, \mathrm{O}_2^{+}, \mathrm{N}_2^{2-}, \mathrm{O}_2^{2-}, \mathrm{F}_2, \mathrm{Ne}_2^{+}, \mathrm{B}_2$

hard

(JEE MAIN-2024)

List$-I$	List$-II$
$(a)$ $Ne _{2}$	$(i)$ $1$
$(b)$ $N _{2}$	$(ii)$ $2$
$(c)$ $F _{2}$	$(iii)$ $0$
$(d)$ $O _{2}$	$(iv)$ $3$

How many bonds (bond order) does $B_2$ have ?

Solution

Similar Questions

In which of the following transformations, the bond order has increased and the magnetic behaviour has changed ?

Match List$-I$ with List$-II.$ List$-I$ List$-II$ $(a)$ $Ne _{2}$ $(i)$ $1$ $(b)$ $N _{2}$ $(ii)$ $2$ $(c)$ $F _{2}$ $(iii)$ $0$ $(d)$ $O _{2}$ $(iv)$ $3$ Choose the correct answer from the options given below:

Which of the following contains $(2C -1e^-)$ bond

In which of the following pairs the two molecules have identical bond order

The number of species from the following which are paramagnetic and with bond order equal to one is___________ $\mathrm{H}_2, \mathrm{He}_2^{+}, \mathrm{O}_2^{+}, \mathrm{N}_2^{2-}, \mathrm{O}_2^{2-}, \mathrm{F}_2, \mathrm{Ne}_2^{+}, \mathrm{B}_2$

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Match List$-I$ with List$-II.$

List$-I$ List$-II$

$(a)$ $Ne _{2}$ $(i)$ $1$

$(b)$ $N _{2}$ $(ii)$ $2$

$(c)$ $F _{2}$ $(iii)$ $0$

$(d)$ $O _{2}$ $(iv)$ $3$

Choose the correct answer from the options given below:

The number of species from the following which are paramagnetic and with bond order equal to one is___________

$\mathrm{H}_2, \mathrm{He}_2^{+}, \mathrm{O}_2^{+}, \mathrm{N}_2^{2-}, \mathrm{O}_2^{2-}, \mathrm{F}_2, \mathrm{Ne}_2^{+}, \mathrm{B}_2$