| Question | Answer |
| 1.State the number of valence electrons in each atom below: He, Na, Si? | He 2
|
2.A solid substance has a density of 1.677g/mL. What is the volume of 17.5g of this substance? | 1.26ml
| 3.A student was trying to calculate the density of ethanol. Using his data, answer the questions below if his calculated average experimental density is 0.93g/mL and the accepted density of ethanol is 0.79g/mL, What is the percent error? | 12%
| 4.Convert each number below to the CORRECT SCIENTIFIC NOTATION:21.8 x 10-5 mL, 0.0043 km? | 2.18
| 5.For each of the numbers below, determine how many significant figures they have:760 mm, 21.010 cm? | 2
| 6.When the molecules gather together, this is an example of a ______ reaction (cold)? | endo
| 7.Write the full electron configurations and show valence electrons for Phosphorus (#15)? | varies
| 8.Write the abbreviated or noble gas configurations and show valence electrons for: Tungsten (#74)? | varies
| 9.Draw the complete electron configuration and a noble gas configuration for the following elements; Fe? | Varies
| 10.In the following pairs, circle the element that answers the question best: Highest ionization energy Mg or Cl? | Mg
| 11.In the following pairs, circle the element that answers the question best: Largest Electronegativity li or N? | N
| 12.How many total electrons can be held by the 3rd principle energy level? | 18
| 13.A covalent bond consists of a shared electron pair, true or false? | true
| 14.__________ are charged particles that used to be a neutral atom but they have lost or gained electrons? | ions
| 15.An American chemist, ___________, developed the concept of electronegativity, for predicting the degree to which bonding pairs of electrons are shared equally or (more often) unequally between atoms? | Linus Pauling
| 16. Write formulas is correct for the following compound; tin(IV) Sulfide? | SnS
| 17. The explosive TNT has the molecular formula C7H5(NO2)3. How many atoms in total are present in one molecule of C7H5(NO2)3? | 21
| 18.What is the correct name for the transition metal; Fe2O3? | Iron (III)
| 19.Based on their electronegativities, determine what type of bond is formed in the compounds below: N-N? | Covalent Non-polar
| 20._________ is defined how many wave peaks pass a certain point per given time? | frequency
| 21.The following electron configurations belong to which elements; 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d2? | Zirconium
| 22.11. How many total electrons can be held in the 6d orbital? | 10
| 23.Once sodium forms an ion and becomes Na +1, the electron value changes due to the charge. How many total electrons will it have? | 10
| 24.An eminent scientist named _________did not believe in chemistry and stated that there were only 4 elements? | Aristotle
| 25.When heated, atoms always emits _________ lines as the electromagnetic "barcode”? | Spectral
| 26.Thomson called these particles corpuscles that are negatively charged_________, because the gas he used was neutral? | electrons
| 27.______________ in a measurement data set will include all known digits and one estimated value? | Sig figs
| 28.How many sig figs present in the following data point; 4,000,000? | 1 |
