Steps for Lewis Structures
Practice!
Shapes? What is this, geometry?
Miscellaneous Chemistry for Fun
100
The first step taken when approaching a Lewis Structure problem
What is Calculating the total number of valence electrons of the compound.
100
The Lewis Structure for water (H2O)
100
How do you know the number of bonding domains?
How do you know the number of non-bonding domains (or lone pairs)?
Bonding domains - you count the number of bonds for the central atom.
Non-bonding domains/lone pairs - you count the number of lone pairs (or electrons outside of bonds in pairs) for the central atom.
100
The equation for formal charge
What is Formal charge = # valence shell electrons - (1/2) bonding electrons - # of lone pair electrons
200
The second step taken when approaching a Lewis Structure problem
What is drawing the basic structure and bonds between the atoms.
200
The Lewis Structure for formaldehyde (CH2O)
200
The electron domain geometry and molecular geometry for XeF4
What is Octahedral (electron domain geometry) and Square Planar (molecular geometry)
200
The definition of resonance structure
What is two or more Lewis structures with the same arrangement of atoms can be written for a molecule or ion
300
The third step taken when approaching a Lewis Structure problem
What is adding remaining electrons to atoms (that are not the central atom).
300
The Lewis Structure for Hexachlorocyclohexane (HCCH)
300
The electron domain geometry and molecular geometry for ClF3
What is trigonal bipyramidal (electron domain geometry) and T-shaped (molecular geometry)
300
The definition of nonpolar covalent bonds
What is the equal sharing of electrons between nonmetals
400
The fourth step taken when approaching a Lewis Structure problem
What is looking at the octet rule and making sure all atoms follow the rule (unless there is an exception!)
400
The Lewis Structure for XeF6
400
The electron domain geometry and the molecular geometry for TeCl42−
What is octahedral (electron-pair geometry) and square planar (molecular structure)
400
The definition of ionic bonds
What is the complete transfer of electrons (between metals and nonmetals)
500
The final step taken when approaching a Lewis Structure problem
What is calculating the formal charge and ensuring all charges are minimized (or optimized).
500
The Lewis Structure for ICl4-
500
The electron domain geometry and molecular structure for PH2−
What is tetrahedral (electron domain geometry) and bent (molecular geometry)
500
The definition of polar covalent bonds
What is the unequal sharing of electrons between two nonmetals