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electrophiles are the species which atta...

electrophiles are the species which attack the regions of............ electron density

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**Step-by-Step Solution:** 1. **Understanding Electrophiles**: Electrophiles are defined as species that are electron-deficient. This means they have a tendency to accept electrons from other species. 2. **Identifying Electron Density**: In chemistry, electron density refers to the probability of finding electrons in a particular region of a molecule. Areas with high electron density are regions where electrons are more concentrated. 3. **Behavior of Electrophiles**: Since electrophiles are electron-deficient, they are attracted to regions where there is a high concentration of electrons. This attraction allows them to form bonds with nucleophiles, which are electron-rich species. 4. **Filling in the Blank**: Based on the understanding that electrophiles attack regions of high electron density, we can fill in the blank in the statement: "Electrophiles are the species which attack the regions of **high** electron density." **Final Answer**: Electrophiles are the species which attack the regions of **high** electron density. ---
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