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Questions and Answers
What is the shape of the CH4 molecule?
What is the shape of the CH4 molecule?
- Octahedral
- Linear
- Tetrahedral (correct)
- Trigonal planar
How does the lone pair in NH3 affect its shape?
How does the lone pair in NH3 affect its shape?
- It makes the shape linear
- It has no effect on the shape
- It makes the shape tetrahedral
- It makes the shape trigonal pyramidal (correct)
In which molecule are the electron domains arranged in a tetrahedral arrangement?
In which molecule are the electron domains arranged in a tetrahedral arrangement?
- CH4 (correct)
- H2O
- NO2
- NH3
What is the repulsion strength order for pairs of electrons?
What is the repulsion strength order for pairs of electrons?
How does the lone pair affect the bond angles in molecules?
How does the lone pair affect the bond angles in molecules?
What is the main principle behind the shapes of molecules according to the VSEPR theory?
What is the main principle behind the shapes of molecules according to the VSEPR theory?
What determines the shape of a molecule according to VSEPR theory?
What determines the shape of a molecule according to VSEPR theory?
What role do non-bonding pairs play in determining the shape of a molecule?
What role do non-bonding pairs play in determining the shape of a molecule?
What is the first step in predicting the shapes of molecules according to VSEPR theory?
What is the first step in predicting the shapes of molecules according to VSEPR theory?
How does the number of electron pairs around the central atom affect the shape of a molecule?
How does the number of electron pairs around the central atom affect the shape of a molecule?
What is the fundamental principle behind predicting the shapes of molecules according to the VSEPR theory?
What is the fundamental principle behind predicting the shapes of molecules according to the VSEPR theory?
How does the number of electron pairs around the central atom impact the shape of a molecule?
How does the number of electron pairs around the central atom impact the shape of a molecule?
What is the role of non-bonding pairs in determining the shape of a molecule?
What is the role of non-bonding pairs in determining the shape of a molecule?
What is the order of repulsion strength for pairs of electrons?
What is the order of repulsion strength for pairs of electrons?
How does the lone pair in NH3 affect its shape?
How does the lone pair in NH3 affect its shape?
What is the shape of the NH3 molecule and how does the lone pair affect its bond angles?
What is the shape of the NH3 molecule and how does the lone pair affect its bond angles?
Explain the repulsion strength order for pairs of electrons according to the VSEPR theory.
Explain the repulsion strength order for pairs of electrons according to the VSEPR theory.
How does the number of electron domains around the central atom influence the shape of a molecule, according to the VSEPR theory?
How does the number of electron domains around the central atom influence the shape of a molecule, according to the VSEPR theory?
In VSEPR theory, what role do non-bonding pairs play in determining the shape of a molecule?
In VSEPR theory, what role do non-bonding pairs play in determining the shape of a molecule?
What is the main principle behind the shapes of molecules according to the VSEPR theory?
What is the main principle behind the shapes of molecules according to the VSEPR theory?
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Study Notes
Molecular Shape and VSEPR Theory
- The shape of the CH4 molecule is tetrahedral.
- The lone pair in NH3 affects its shape by repelling the bonding pairs, resulting in a trigonal pyramidal shape.
- The electron domains in the CH4 molecule are arranged in a tetrahedral arrangement.
- The repulsion strength order for pairs of electrons is: lone pair-lone pair > lone pair-bonding pair > bonding pair-bonding pair.
- The lone pair affects the bond angles in molecules by reducing them due to greater repulsion.
- The main principle behind the shapes of molecules according to the VSEPR theory is that electron pairs around the central atom arrange themselves in a way to minimize repulsion.
- The shape of a molecule is determined by the number of electron pairs (bonding and non-bonding) around the central atom.
- Non-bonding pairs play a significant role in determining the shape of a molecule by repelling bonding pairs and affecting bond angles.
- The first step in predicting the shapes of molecules according to VSEPR theory is to count the number of electron pairs around the central atom.
- The number of electron pairs around the central atom affects the shape of a molecule by influencing the arrangement of electron domains.
- The fundamental principle behind predicting the shapes of molecules according to the VSEPR theory is that electron pairs arrange themselves to minimize repulsion.
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