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Chapter 7: Problem 71

Given the following electronegativities $$ \mathrm{C}=2.5 \quad \mathrm{~N}=3.0 \quad \mathrm{~S}=2.6 $$ what is the central atom in CNS \(^{-}\) ?

Short Answer

Expert verified
Answer: Carbon (C) is the central atom in the CNS- molecule.

Step by step solution

01

Identify the atom with the lowest electronegativity

To identify which atom has the lowest electronegativity, compare the given electronegativities: $$ \mathrm{C}=2.5 \quad \mathrm{~N}=3.0 \quad \mathrm{~S}=2.6 $$ The atom with the lowest electronegativity value is Carbon (C) with a value of 2.5.
02

Determine the central atom

Since Carbon has the lowest electronegativity value, it will be placed at the center of the molecule. Therefore, Carbon (C) is the central atom in the CNS\(^{-}\) molecule.

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Most popular questions from this chapter

Predict the geometry of the following species: (a) \(\mathrm{SCO}\) (b) \(\mathrm{IBr}_{2}^{-}\) (c) \(\mathrm{NO}_{3}^{-}\) (d) \(\mathrm{RnF}_{4}\)

Draw resonance structures for (a) \(\mathrm{Cl}-\mathrm{NO}_{2}\) (b) \(\mathrm{H}_{2} \mathrm{C}-\mathrm{N}-\mathrm{N}\) (c) \(\mathrm{SO}_{3}\)

In which of the following molecules does the sulfur have an expanded octet? For those that do, write the Lewis structure. (a) \(\mathrm{SO}_{2}\) (b) \(\mathrm{SF}_{4}\) (c) \(\mathrm{SO}_{2} \mathrm{Cl}_{2}\) (d) \(\mathrm{SF}_{6}\)

Consider the following molecules: \(\mathrm{SiH}_{4}, \mathrm{PH}_{3}, \mathrm{H}_{2} \mathrm{~S}\). In each case, a central atom is surrounded by four electron pairs. In which of these molecules would you expect the bond angle to be less than \(109.5^{\circ}\) ? Explain your reasoning.

Dinitrogen pentoxide, \(\mathrm{N}_{2} \mathrm{O}_{5}\), when bubbled into water can form nitric acid. Its skeleton structure has no \(\mathrm{N}-\mathrm{N}\) or \(\mathrm{O}-\mathrm{O}\) bonds. Write its Lewis structure.
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