
The bond between two identical non metallic atoms has a pair of electron:
A. unequally shared among the two atoms.
B. equally shared among two atoms.
C. equal transfer of electrons from one atom to another atom.
D. shared by only one atom.
Answer
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Hint: Generally non metals form covalent bonds. Covalent bonds are formed due to sharing of electron pairs among two atoms.
Complete step by step solution:Two identical non metallic atoms have same electronegativity and the condition to form a covalent bond is that the constituent atoms must have the same electronegativity. As the electronegativity difference of a bond decreases its covalent character increases. Thus two non metallic atoms form a pure covalent bond.
Again we know that in a pure covalent bond electrons are shared equally among the atoms.
Let us take an example of a covalent bond between two hydrogen atoms. The general valence shell electronic configuration of hydrogen atom is \[1{{s}^{1}}\].Thus it contains one electron in the ns subshell. Thus it needs one more electron to get the noble gas configuration and become stable. Thus two hydrogen atoms come close and share their electrons to form a covalent bond.
Thus the correct option is B.
Note: The covalent bond can be polar and nonpolar. The covalent bond formed between two identical nonmetal atoms is always non polar. Thus no charge is developed in the constituent atoms.
Complete step by step solution:Two identical non metallic atoms have same electronegativity and the condition to form a covalent bond is that the constituent atoms must have the same electronegativity. As the electronegativity difference of a bond decreases its covalent character increases. Thus two non metallic atoms form a pure covalent bond.
Again we know that in a pure covalent bond electrons are shared equally among the atoms.
Let us take an example of a covalent bond between two hydrogen atoms. The general valence shell electronic configuration of hydrogen atom is \[1{{s}^{1}}\].Thus it contains one electron in the ns subshell. Thus it needs one more electron to get the noble gas configuration and become stable. Thus two hydrogen atoms come close and share their electrons to form a covalent bond.
Thus the correct option is B.
Note: The covalent bond can be polar and nonpolar. The covalent bond formed between two identical nonmetal atoms is always non polar. Thus no charge is developed in the constituent atoms.
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