Atomic Structure
Ionic Compound Nomenclature
Solutions
Potpourri
Lewis Structures
VSEPR
100
21 protons, 24 neutrons, 21 electrons.
What is 45Sc (Scandium-45)?
100
This is the formula for beryllium phosphide.
What is Be3P2?
100
A solution of 1.25 M NaCl will contain this many moles of sodium chloride in two liters.
What is 2.50?
100
Atomic radius increases as you move down each group. Across each period, the atomic radius does this.
What is decrease?
100
An exception to the Octet Rule, this element "likes" to have only six electrons.
What is boron (B)?
100
A molecule with one lone pair, a single bond, and a triple bond on the central atom has this number of steric groups.
What is three?
200
37 protons, 36 electrons, and 49 neutrons.
What is 86Rb+?
200
This is the formula for calcium hydroxide.
What is Ca(OH)2?
200
To produce 3.00 L of 0.10 M NaBr, you would need to mass out this many grams of NaBr.
What is approximately 31 grams?
200
These are the formulas of all of the naturally occurring diatomic molecules.
What are I2, H2, N2, Br2, O2, Cl2, F2?
(I Have No Bright Or Clever Friends)
200
A nitrogen atom will typically only form this many bonds in a covalent compound.
What is three?
200
This is the molecular geometry of hydrogen sulfide, H2S.
What is bent or angular?
300
This element would have the electron configuration: [Ne] 3s2 3p3
What is P (phosphorus)?
300
This is the name of the compound, FeO.
What is iron (II) oxide?
300
When 100. grams of CaF2 is dissolved in 5.00 L of solution, this is the resulting molarity of calcium fluoride.
What is 0.256 M CaF2?
300
This expression represents the FORMAL CHARGE on the central atom in the water molecule.
What is FC = 6 - 1/2(4) - 4 = 0 ?
300
This is the number of valence electrons available to bond in a molecule of acetic acid (vinegar), HCH3COO.
What is 24?
300
This is the VSEPR shape of a molecule of ammonia, NH3.
What is trigonal pyramidal?
400
Elements from group 1 ("A") and group 15 ("C") would combine in this ratio.
What is 3A:1C? (A3C)
400
This is the formula for copper (II) phosphate.
What is Cu3(PO4)2?
400
This is the resulting concentration when 100. mL of 0.50 M hydroiodic acid is diluted to a final volume of 300. mL.
What is 0.167 M?
400
This is the number of atoms represented by the expression, 5Mg3(PO4)2.
What is 65?
400
This is the most reasonable Lewis structure for phosphorus trichloride, PCl3.
What is:
400
This is the shape of a molecule of boron tribromide, BBr3.
What is trigonal planar?
500
An element, X, with the electron configuration {[He] 2s2 2p4} would form this compound when bonding with aluminum.
What is Al2X3?
500
This is the name of the compound, Co2CO3.
What is cobalt (I) carbonate?
500
When 87 grams of potassium sulfate are dissolved in sufficient water to produce 300. mL of solution, this is the resulting concentration of potassium ion.
What is 3.33 M?
500
A sealed 9.00-L vessel containing helium gas under a pressure of 1.55 atm at 25oC would contain this number of moles of helium.
What is 0.570 moles of helium?
500
This is the most reasonable Lewis structure for hydrogen cyanide, HCN.
What is: 
500
This is the molecular geometry of a molecule of xenon tetrafluoride.
What is square planar?