question archive Using four different polyatomic ions, create four different legitimate (working) ionic chemical formulas

Using four different polyatomic ions, create four different legitimate (working) ionic chemical formulas

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Using four different polyatomic ions, create four different legitimate (working) ionic chemical formulas.

1. Use the electronegativity values given on the periodic table and show the math to confirm or deny the following statements:

2. Aluminum bonded to oxygen is a fully ionic bond

3. Carbon bonded to hydrogen is a polar covalent bond

4. Potassium bonded with bromine is a polar covalent bond

5. Silicon bonded to bromine is a fully covalent bond

1. Draw the lewis structure for water (H2O).  How many lone pairs of electrons are in this structure?

1. Draw the lewis structure for methane gas (CH4).  How many lone pairs of electrons are in this structure?

1. Draw the lewis structure for carbon dioxide (CO2).  How many lone pairs of electrons are in this structure?

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1) KCN, NaNO3, LiOH, CaSO4

2-5) see explanation

1) see explanation for structures

H2O: two lone pairs

CH4: no lone pairs

CO2: four lone pairs

2) Ionic bond: >1.8 Polar Covalent bond: 1.8-0.4 Covalent: <0.4

Al: 1.61 O: 3.44

(3.44-1.61)=1.83 Ionic (TRUE)

3) C: 2.55 H: 2.20

(2.55-2.20)=0.35 Covalent (FALSE)

4) K: 0.82 Br: 2.96

(2.96-0.82)=2.14 Ionic (FALSE)

5) Si: 1.9 Br: 2.96

(2.96-1.9)=1.06 Ionic (TRUE)

1)

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