Question

name maddu beckman date: 1/... per __ more lewis structure practice!!! nh₃ ammonia h₂o h₂s h₂o₂ hydrogen peroxide chcl₃ methyl chloride hcn hydrogen cyanide ch₃oh methanol bf₃ f₂

Answer:

To determine the missing names and complete Lewis structures, we analyze each compound:

1. $\boldsymbol{H_2O}$ (Water)

• Name: Water (common name) or Dihydrogen monoxide (systematic).
• Lewis Structure: Oxygen (O) is central, bonded to 2 H atoms. O has 2 lone pairs. Structure: $ \text{H}-\text{O}-\text{H} $ (with 2 lone pairs on O, often represented as $ \overset{..}{\text{O}} $ between H atoms).

2. $\boldsymbol{H_2S}$ (Hydrogen sulfide)

• Name: Hydrogen sulfide.
• Lewis Structure: Sulfur (S) is central, bonded to 2 H atoms. S has 2 lone pairs. Structure: $ \text{H}-\text{S}-\text{H} $ (with 2 lone pairs on S, similar to $ \text{H}_2\text{O} $ but with S).

3. $\boldsymbol{H_2O_2}$ (Hydrogen peroxide)

• Lewis Structure: Two O atoms bonded (single bond), each bonded to 1 H. Each O has 2 lone pairs. Structure: $ \text{H}-\overset{..}{\text{O}}-\overset{..}{\text{O}}-\text{H} $ (lone pairs on each O).

4. $\boldsymbol{CHCl_3}$ (Chloroform, or Methyl chloride)

• Lewis Structure: Carbon (C) is central, bonded to 1 H and 3 Cl atoms. C has 4 bonds (single bonds to H and each Cl). Structure: $ \text{Cl}-\overset{\text{Cl}}{\underset{\text{Cl}}{\text{C}}}-\text{H} $ (tetrahedral, with Cl atoms around C).

5. $\boldsymbol{HCN}$ (Hydrogen cyanide)

• Lewis Structure: H bonded to C, C triple-bonded to N. Structure: $ \text{H}-\text{C} \equiv \text{N} $ (C has 4 bonds: single to H, triple to N).

6. $\boldsymbol{CH_3OH}$ (Methanol)

• Lewis Structure: C bonded to 3 H and 1 O; O bonded to 1 H. O has 2 lone pairs. Structure: $ \text{H}_3\text{C}-\overset{..}{\text{O}}-\text{H} $ (or $ \text{H}-\overset{\text{H}}{\underset{\text{H}}{\text{C}}}-\overset{..}{\text{O}}-\text{H} $).

7. $\boldsymbol{BF_3}$ (Boron trifluoride)

• Name: Boron trifluoride.
• Lewis Structure: B is central, bonded to 3 F atoms (trigonal planar). B has no lone pairs (incomplete octet). Structure: $ \text{F}-\text{B}-\text{F} $ (with a third F, forming a triangle: $ \overset{\text{F}}{\underset{\text{F}}{\text{B}}}-\text{F} $, each B-F bond is single, and B has 6 valence electrons).

8. $\boldsymbol{F_2}$ (Fluorine gas)

• Name: Fluorine.
• Lewis Structure: Two F atoms bonded (single bond), each with 3 lone pairs. Structure: $ \text{F}-\text{F} $ (with 3 lone pairs on each F: $ \overset{..}{\text{F}}-\overset{..}{\text{F}} $).

Final Table (Completed)

Formula	Name	Lewis Structure (Simplified)
$ \text{H}_2\text{O} $	Water	$ \text{H}-\overset{..}{\text{O}}-\text{H} $ (lone pairs on O)
$ \text{H}_2\text{S} $	Hydrogen sulfide	$ \text{H}-\overset{..}{\text{S}}-\text{H} $ (lone pairs on S)
$ \text{H}_2\text{O}_2 $	Hydrogen peroxide	$ \text{H}-\overset{..}{\text{O}}-\overset{..}{\text{O}}-\text{H} $
$ \text{CHCl}_3 $	Chloroform (Methyl chloride)	$ \text{Cl}-\overset{\text{Cl}}{\underset{\text{Cl}}{\text{C}}}-\text{H} $
$ \text{HCN} $	Hydrogen cyanide	$ \text{H}-\text{C} \equiv \text{N} $
$ \text{CH}_3\text{OH} $	Methanol	$ \text{H}_3\text{C}-\overset{..}{\text{O}}-\text{H} $
$ \text{BF}_3 $	Boron trifluoride	$ \text{F}-\text{B}-\text{F} $ (trigonal planar, third F omitted for simplicity)
$ \text{F}_2 $	Fluorine	$ \overset{..}{\text{F}}-\overset{..}{\text{F}} $ (3 lone pairs on each F)

For example, the missing name for $ \text{H}_2\text{O} $ is "Water", and its Lewis structure is $ \text{H}-\overset{..}{\text{O}}-\text{H} $.