Ionic & Covalent Bonding
Chemical Nomenclature
Lewis Symbols & Structures
Formal Charges & Resonance
Molecular Structure & Polarity
100
These subatomic particles change to form a positively-charged cation.
What are electrons? (Protons do not change during normal chemical reactions. Only the outer electrons move).
100
This is the name of the compound HBr.
What is hydrogen bromide?
100
This is the number of electrons in the compound shown below.
What is 8?
100
This is the formal charge of the atom ICl4-.
What is -1?
I: 7-8 = -1
Cl: 7-7 = 0
-1 + 0 = -1
100
This theory enables us to predict the molecular structure, including approximate bond angles around a central atom, of a molecule from an examination of the number of bonds and lone electron pairs in its Lewis structure.
What is valence shell electron-pair repulsion theory?
200
This type of bond results from the mutual attraction of atoms for a shared pair of electrons.
What is a covalent bond?
200
This is the chemical formula for sodium oxide.
What is Na2O?
200
The element Li+ has this many electorns.
What is zero?
200
This is the most likely molecular structure for the (NO2-) ion.
What is ONO-?
200
Two regions of electron density around a central atom in a molecule form this type of geometry.
What is linear?
300
The binary ionic compound, Cs, would have this charge?
Cs+
300
This is the chemical formula for titanium(IV) oxide.
What is TiO2?
300
The Lewis symbol for this ionic compound is shown here.
What is K2O?
300
This is how one determines the formal charge of an atom in a molecule.
What is the hypothetical charge the atom would have if we could redistribute the electrons in the bonds evenly between the atoms? (AKA the number of valence electrons of a neutral atom, subtract the nonbonding electrons, and then subtract the number of bonds connected to that atom in the Lewis structure)?
300
This is the electron-pair geometry of BCl3.
What is trigonal planar?
400
This factor causes increasing polarity in covalent bonds.
The absolute value of the difference in electronegativity increases.
400
This is the name for the compound (NH4)2SO4
What is ammonium sulfate?
400
A triple bond shares this many electrons.
What is six?
400
If two or more Lewis structures with the same arrangement of atoms can be written for a molecule or ion, this is the actual distribution.
What is the average of that shown by the Lewis structures? (a resonance hybrid)
400
This is the electron-pair geometry of PF5.
What is trigonal bipyrimidal?
500
This element in the periodic table is the most electronegative.
What is F (flourine)? (electronegativity increases as you go to the right and up in the periodic table, but noble gases are excluded).
500
This is the name of the compound MoS2.
What is molybdenum(IV) sulfide?
500
This electron configuration corresponds with this atom.
1s22s22p63s23p64s23d104p4
What is selenium?
500
This is the formal charge of Cl in the molecule ClF5.
What is 0?
500
This is the bond angle in a linear molecular structure.
What is 180 degrees?