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1\ tl.J _"y\ 'jtJ>Y {\o ~ 2 1. (24)a. Number the following types of light from lowest (#1) to highest (#4) frequency. 2J - 1-infrared - ~ • ---,-t./-_uv visible b. Number the following elements from lowest (#1) to highest 3 - -CI I radio (#4)~. ~oYV\lc... ("~d; u.s K Ca c. What is the maximum number of electrons in an atom that can be described with the quantum numbers n=3, 1=2, ml= -2 cl. 3d x ~~ d. What element has the following valence electron configuration in an excited state? 1...- --±- i.t t :L 1 4s 3d e. Give the number of unpaired electrons in the ground state electron configuration of Cr: ~. i ~ ~~ L~LtL 3d f. How many electrons and protons , respectively, are in ~~ Kr a) 36 , 56 b) 56 , 36 c) 92,36 d) 36,92 e) 56 , 92 @6, 36 g. Underline the compound with the shortest C-C bond . Circle the compound with the longest C-C bond. ' Ie., ~£, '+Y,p\~ CH 3 CH 3 ~ CH 2 CH 2 FCCF h. The formula of a salt is XCI 2 . The X-ion in this salt has 28 electrons. The metal X is 2. ~oVide names or formulas for the following compounds: PCI, a strontiu m cyanide 5 (' (c /',j) :l- Zn fbO¥haraus -Ir;cJJav,~ Fe( BrQ, h In"" (.(!;:j p?d.'1JlY1tde. 3. (12) Draw two resonance contributors for H2 CN 2 (connectivity shown below) that have all octets filled. ~ \ of" 1 to Lj + 10 ~ Circle the most favorable . l:- ".fc. Ita vo..1e..nc.e. e ~Jc .... .. -\ .." H--C--N--N: I H .. ~ +\ - , .. f:) c- i\i ::.~r \ H o ~L -I #I'" ••• N-=-~· i ~. or'\ 3 4. (12) Complete the table. ~F5+ KrF4 . . ". :P-i<.r .. ,-, -F· .. Most favorable Lewis structure 'f.' 0- '. • l ~ F-S-F 'I f/ '-r'" I :F.' Electron pair geometry name Molecular geometry name oc+o..~roJ gDD Sketch of shape, including lone pairs. I -h-Iq \ I -tv- 19 blp~ ra.rn.i da l \ l -I'F '. r,.,,,, \\,,\ Kr -F-~ ( b;f'lrCAffi4dJ I ~' pla.na.r Bond angle + lao o \ 1 t- ~ ) QOo F ,..........,-1 '.r". 5 I -F 1 t=' P" ~ .~ L--- ' . ,. ~ 5. (10) ., "., :;> , .J -1" a. Construct a molecular orbital diagram for C2". b. Rank in terms of increasing bond strength: C2". C 2 , and C2 + .:;... c. Where you listed your ranking, circle any compound that is paramagnetic. ~ ~ - , L.f ~ ,;' :J. •• ...... ~,) /' 6. (6).What is the ratio of the second ionization energy of He to the first ionization energy of H? Show the z..a 2. equation you used as the basis of your answer. ~E"'" -a.n~ ~/D-I~J(~ (~ ~e ) Coo ~ o _%'2.) .. I ;r:£.,;t Hi -e -L I 1.5 ..- I H· . '-1)( ~S~t'f 'tho..¥] \~0-cY' 4 7. (8) Fill in the blanks with a word from the following list of possibilities. The of?l'Y),1 ~f eJt-c.+v &Y) a d~'r'\j of an element is the energy change upon an electron to an atom in the gas phase, forming a(n) value means the ion is stable, and in general, these values become (Y\ OY""~ left to right across the periodic table. In another periodic trend, atomic radii proceed left to right across a row. Cations are HALOGENS ZERO EL.£C:mGN- REMOVING LEAST CATION LARGER LEFT AF~ SOLUTION 7J'Y\~ . A (leg a+fv€!.. CU1 i orJ negative as we move d.e..c.reQ $;;:6s we than their parent atoms. SMALLER IONIZATION ENERGY POSITIVE Arn1tNG RIGHT ANtOf\r N!;cATI'v'E MORE LESS MOST ~ CONSTANT SAME LESS 8. (6) Define these terms as used in chemistry: a. Lewis acid - b. Precision - e: pr Q~ du.v ft'J Qn L-Vt1/ilhl \l'ah!u shdJ rqx-a.fa..bt!.Jy cfP- ~~ A 9. (6) Silver has two isotopes, with masses 106.9051 g/mol and 108.9048 g/mol. a. Use your periodic table to find the relative abundance of each isotope. (Don't do the math-- just write the equation and fill in the numbers you would enter into your calculator). -:: ( rr;o A " I0l9.c105~ \ n'\O\ ) -t (IDO-'%~). J -=%B b. Show how you would calculate the mass of 100,000 bromine atoms. IDOt/X) o.:hrms & I · lV<l.'\D<l'D j/~