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exam tips:
1. Prepare by doing the exam review, and don't worry. You will do better with a good night's sleep.
2. Work quickly through the exam, circle on test the questions you want to come back to, but put an answer in the first time.
3. Do all of the non scantron questions; you will get some points for just trying
4. Say a prayer before you study.
MR JOHNSON’S SEMESTER 1 CHEM EXAM REVIEW – ANSWER THE FOLLOWING ON SEPARATE PAPER AND TURN IN WITH THE CLASS WORK DONE DURING THE 'SUB' DAYS. THESE WILL BE COLLECTED THE DAY OF THE EXAM, before the exam)
It is a good idea to review notes ch1-6;
The 5 dots I will not check to see if these are done, but they can be good practice; things you miss could be written out and attached to the review.
Calculations of Formula Mass - Review of the concepts taught in Unit 2 and Unit 3
Mole Conversions - Unit 4 Benchmark #1. Converting from mass to moles and vice-versa.
Formula Mass and Gram/Mole/Volume Conversions - Multiple choice. The relationship between grams, moles, standard molar volume, and Avogadro's number
review atomic structure by doing atomic structure questions ,
I recommend you do questions and tutorials from 7 chemthink ... (particle nature, atomic structure, ion formation(ions), isotopes, ionic formulas, ionic bonding, covalent bonding, molecular shapes, ) we have done; the pdfs from them should be attached to exam review.
the following You must write it out; it may not be typed on the computer
Compare and/or give examples:
a. heterogeneous mixture, homogeneous mixture, element, compound
b. chemical, physical, extensive, and intensive properities
c. metal, nonmetal, metalloid
Define these prefixes, and give a conversion factor for each: kilo, milli, centi
Define mass, volume, weight, density, temperature, distance and match with g, L, K, m, cc, g/cc, mL
List the steps of scientific method
Place these 5 atomic models in chronological order, make a rough sketch of each, and list main pts of each
Compare flame and spectrum tests
Define frequency and wavelength and describe their relationship to energy
list families found in s,p,d,f blocks
What does the period and group tell you about an atom’s electron configuration?
What is a stable electron configuration? How do metals reach it? Nonmetals?
What happens to atomic radii as one goes across the pd? Down the group?
What happens to ionization energy as one goes across the pd? Down the group?
What happens to nuclear charge as one goes across the pd? Down the group?
Make a table comparing element families. Include group #, name, block, characteristics
Make a table comparing ionic, covalent and metallic bonding include type of elements, what the outer electrons do, and examples.
Give the charge of Na, Kr, Ca, N, O, Cl ions.
Calculate the density of a 355g cube that is 4.5cm on a side; round to correct significant digit. Will the above cube float or sink in water? Why?
Make a table showing the # protons, neutrons and electrons in U-235, bromide ion, aluminum ion, and sodium atom.
change 4.5 * 1012 and 6.2 * 10-4 to standard numbers; then divide 18 * 1023 by avogadro's number
Find the thickness of of Al foil 25cm*12cm if mass is 5.5g and density is 2.7g/cc
Convert 40g of water into moles and molecules. When is mole day? Why? What are the 2 things every student must know about the mole?
electron configurations, 3 types=?
Convert 3 inches to meters if 1inch = 2.54cm.
What is the % error when the exp density of Al is found to be 2.6g/cc? (look up actual density)
What is wave particle duality?
Why is the periodic table called periodic?
What is a particle accelerator? Where is the largest one? What happens there?
For Mg and S find:
number of outer electrons
number of energy levels
group number
period
number of total electrons
block
family
Identify the element, and make dot diagram, name the family
a. 1s2 2s2 2p6 3s2 3p1
b. 1s 11 2s11 2p 11 11 1
c. [Ar] 4s2 3d1
d. 1s2 2s2 2p6 3s2 3p6
e. 1s 11 2s11 2p 11 11 11 3s11 3p1 1 1
f. [Ar] 4s2 3d10 4p2
g. 1s2 2s2 2p6 3s2
h. 1s 11 2s11 2p 1
i. [Ar] 4s2 3d8
make dot diagrams for Xenon, Zinc, Strontium, Boron, chlorine
Si, Ti, As. tell what energy level contains their outer electron and how many outer electrons they have
write chemical formulas for water, salt, carbon dioxide, methane, and find the mass of a mole of each substance
Write chemical formulas or names for CaS , NO, aluminum oxide, FeS, magnesium floride, sodium nitride,
sodium phosphide, aluminum sulfide, HF, CO
(if done) Which ink color is more polar blue or yellow? How can you tell from the chromatography experiment?
draw Lewis structures, describe shape and polarity for: Magnesium chloride, methane, water, silicon tetrabromide, sodium sulfide
give names for compounds CaF,HNO3, CO2, NO, CuF, CoS, HI, Na2O, Sr(ClO)2 ;
give formulas for Vanadium (V) sulfide, magnesium phosphide, rubidium sulfide, potassium phosphate, dinitrogen trisulfide, carbon monoxide;
find formula mass and molar mass, of Aluminum sulfate, titanium (VI) phosphate, magnesium floride, calcium nitride, Na2O, Sr(ClO)2
Make a table showing lewis structure of lithium sulfide, water, HCl, NH3, and CH4
then show molecular structure with dashes, shape, and polarity of the molecules
Find molar mass of aluminum sulfide and Aluminum carbonate. calculate % composition
(if done in class) Describe at least 3 special properties of water and the molecular reasons for them. Draw 3 water molecules in proximity. Name the 2 bonds present in water, and compare their strengths; What is the evidence for their relative strengths. Is water polar? Why or why . not?
Your exam will be 80- 100 multiple choice and problems/ essay page
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