Multiple Choice
After drawing the Lewis structure of CBr4, what are the electron domain geometry and molecular geometry around the central carbon atom?
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11. Bonding & Molecular Structure
Lewis Dot Structures: Neutral Compounds
Multiple Choice
Which of the following best represents the Lewis dot structure of HF, with the elements in the order H–F?
A
H–F
B
H :F:
C
:H–F:
D
H::F
Verified step by step guidance1
Step 1: Identify the total number of valence electrons for the molecule HF. Hydrogen (H) has 1 valence electron, and fluorine (F) has 7 valence electrons, so the total is 1 + 7 = 8 valence electrons.
Step 2: Determine the bonding between the atoms. Since HF is a diatomic molecule, hydrogen and fluorine will share a pair of electrons to form a single covalent bond, represented as H–F.
Step 3: Assign the remaining valence electrons as lone pairs. After forming the single bond (2 electrons), fluorine will have 6 electrons left, which are placed as three lone pairs around fluorine.
Step 4: Represent the Lewis structure by showing the single bond between H and F, with fluorine having three lone pairs (six dots) around it, and hydrogen having no lone pairs since it only needs 2 electrons to complete its shell.
Step 5: Confirm that the Lewis structure satisfies the octet rule for fluorine (8 electrons total) and the duet rule for hydrogen (2 electrons total), ensuring the structure is stable and correctly represents HF.
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