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chemical formula and Electron-Dot Structures

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1. Naming Covalent Compounds
Part A
What is the name of the covalent compound CCl4 ?

Part B
What is the name of the covalent compound N2O5?

2. Octet Rule and Ions
Part A
Construct an orbital diagram to show the electron configuration for a neutral magnesium atom, Mg .

Part B
To form a stable ion, will magnesium gain or lose electrons? How many electrons?

Part C
Match each ion with the noble gas whose electron configuration it shares.

3. Writing Ionic Formulas
Part A
What is the formula for iron(III) oxide?

Part B
What is the formula for strontium chloride?

Part C
Sort the following chromium compounds by whether the cation is chromium(II) or chromium(III).

4. Covalent Molecules and the Octet Rule
Part A
Below is the structure of acetyl chloride, drawn with bonds and electron dots. Determine how many nonbonding and bonding electrons are shown.

Part B
Which structure below represents a molecule with the correct electron dot formula?

5. Polyatomic Ions
Part A
What is the name of the ionic compound BaCO3?

Part B
What is the molecular formula for ammonium nitrate?

6. Ionic Compounds
Part A
Determine whether the following pairs of elements can form ionic compounds.

Part B
What is the formula for an ionic compound that contains the elements calcium and fluorine?

7. Molecular Shapes
Part A

Match each two-dimensional structure to its correct three-dimensional description.

8. Writing Electron-Dot Structures
Part A
If the boron nitride molecule, BN, were to form, what would its structure look like?

Problem 4.4
State the number of electrons that must be gained by atoms of each of the following elements to acquire a noble gas electron arrangement.

Part A. Cl

Part B. O

Part C. N

Part D. I

Part E. P

Problem 4.6
How many protons and electrons are in the following ions?

Part A. O2-

Part B. K+

Part C. Br-

Part D. S2-

Part E. Sr2+

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Solution Summary

The solution provides examples of finding the chemical formulas and electron dot structures for the molecules. The solution is detailed and has a '5/5' rating.

See Also This Related BrainMass Solution

Organic Structures: Polarity and Electron-Dot Formulas

Please see the attachment for a better formatting of these questions.

1) Draw a structural formula for each of the following molecules. Which bonds are polar? Indicate the polarity by proper placement of the symbols d+ and d-.
a. CH3Cl
b. H2

2) Draw structural formulas for all possible isomers having the following molecular formulas:

3) Write electron-dot formulas for the following ionic species. Show the formal charges on individual atoms in each ion.

bisulfite ion, HSO3¯
ammonium ion, NH4+
carbonate ion, CO32¯
carbon dioxide, CO2
chlorate ion, ClO3¯
chlorite ion, ClO2¯

4) Fill in any electron pairs that are missing from the following formulas:


b. CH3OCH3

(double bond) between the O and C

5) Use lines, dashed wedges, and solid wedges to show the geometry of CH4, CH2Cl2, and CF3OH.

6) Write a structural formula that corresponds to the molecular formula C6H12O and is:
- Acyclic
- Carbocyclic
- Heterocyclic

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