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WA. Homework 3 - H Identify Hie element wifli each of the...

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Unformatted text preview: . ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, H Identify Hie element wifli each of the following elechon configuration-3. (a) [Ar]4523d5 -x Emanganese for? Mn (b) [Ar]4523d6 -V Eiron -or- Fe (c) [He]2522p4 -’ onygen for? D (d) [Kr]55’24dm5p2 .’ Etin for? Sn Consider the following table of quantum numbers. For each set with the given value of n, one of the other numbers in the combination, I, m\ or m5 is not allowed. Select which quantum number is not allowed in each set. Set b: c: O] ('3 What are the n and 1 quantum numbers for the electIons with the highest energy in the following atoms? Identify the elements {by typing in the symbob“ with the following electron configurations: a) [1015524115 I“ Em b) [Ne]3523p4 I“ E c) [Xe16524f‘45d7 I« m d) [i<r]5_r.24d1°5pa I“ Esb Give the number of 5, p, d, and felectrons in each of the following atoms. s p d I Hg I“ E12 I“ E24 I“ EEO I“ E14 I IX E10 I“ 923 I“ E20 I“ ED Fe I" E I“ E12 I“ Es [I BE Ga I" BE .w/ an I“ E10 I“ How many unpaired electIons are present in each of the following? (a) phosphorus I’EE (b) sulfur rm (c) chlorine I" BE (d) cobalt I" E Indicate whether each the orbital occupancy shown is a ground state, an excited state, or not allowed. If it 'E a ground state occupancy, identify the atom. If it 'B not the ground state, explain why. Assume the Is and a sublevels are full. 3-D El El U unnrm [Elli] mDIIIII [KNEE] -) h) a] d] (E) Q E ground state 0 excited state 0 not allowed Internet Ezuplorer Ile Edit Iew Favorite Tools Help Favorila TFLN f Home E Twitiel AIM Mail NCSU NC Stale Wehmail m: VuuTub: 3 Amazon NCSU Dining m WebAssign TV Listings H Headlins Badmfimmw xl | Key: oxygen atom (b) ® 6! ground state excited state not allowed Key: nitrogen atom (C) ground state ® ,5! exerted state not allowed Key: orbital energy (d) Q :53 ground state excited state not allowed Key: fluorlne atom The threshold frequency for the ejection of an electron from iron is. 1.1 x ID15 5". Indicate whether each of the following photons has enough energy to eject an electron from an iron atom. (3)1124mm Yes ®fiNo 0}) ll .9 nm top Q) Yes No (c blue light .__. Yes ®§Mo (d) an xiray ® a Yes No Done .lnlemefll’mlecledModa On 43‘ v 3.100% v Indicate whether each the tiansition would he an em'ssion or an absorption. The notation '4p —> 65' means the transition from a 4,9 orbital to a 45 orbital. (a) 4p —> 65 absorption E) emission V (b) 31:! 41 3p CI absorption ® @emrsslon V (c) 85 _> of (cl) 4p —> 45 ('1 absorption ® gemission Fill in the following table. Efmol photons )1(l|m) v (5-1) Efphoton (J) (kl/Incl) 901 -X E333e+14 -X Elna-19 .X 133 .x E600. Check the number of sigmficant figures. 5.00 x 1|)14 - E3.31e*19 -’ E199 -x E2.80e+03 Check the number ofsignificant figures. SIB -V E1.D7e+14 7.10 x 10'2” -'/ E5.79e+14 -V/ E33491; 231 1n the photoelectric effect for a given material, light at energy less than the threshold energy is unable to remove an electron from the material, whereas light at energy greater than the threshold energy can result in ejection of an election. The threshold frequency for the ejection of an election from iron E 1.1 X 1015 5". Indicate whether each of the following photons has enough energy to eject an electron from an iron atom. You can use a calculator or you can refer to Figure 2.2 in the textbook. (a))t=2cm 0 yes 9.32m) (b) 2 nm a: yes 06> (c .__. infrared light des Q 33 no (d) an xiray yes Ono What two atoms have two unpaimd elechonl; in the 3p subievel? ...
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