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Skills Practice Answers. Skills Practice 1 1.9,434,880 mL 2.17.8 cases 3.0.333 pallet 4.a) 0.1560 m b) 4.1x10 10 c) 92,000 μm d) 91,600 nm 5.a) 2.229x10.

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Presentation on theme: "Skills Practice Answers. Skills Practice 1 1.9,434,880 mL 2.17.8 cases 3.0.333 pallet 4.a) 0.1560 m b) 4.1x10 10 c) 92,000 μm d) 91,600 nm 5.a) 2.229x10."— Presentation transcript:

1 Skills Practice Answers

2 Skills Practice 1 1.9,434,880 mL cases pallet 4.a) m b) 4.1x10 10 c) 92,000 μm d) 91,600 nm 5.a) 2.229x10 7 b) 8.07x10 6 c) 5.41x10 20 d) 1.12x a) x10 10 b) 3.51x a) 235,400 b)

3 Skills Practice , ,910, x x10 5

4 Skills Practice 8 1.a) 21b) Scandium (Sc) c) 22 2.Atoms of the same element (having the same number of protons) with a different number of neutrons. 3.a) -2 b) sulfurc) ; B) ions 8.Strontium (Sr) Symbolneutronsprotonselectronsatomic #mass #

5 Skills Practice 9 1.a) amub) Arsenic (As) 2.a) amub) Chromium (Cr) 3.The most abundant is the one with a mass of amu amu

6 Skills Practice 10 1)Ground state: the normal energy level that an electron occupies. Excited state: when an electron has absorbed energy to occupy a higher energy level. 2)7.11x10 -8 m 3)8.62x J 4)3.68x J 5)a) 8.52x10 14 Hzb) 5.65x J 6)f=7.68x10 14 Hzwavelength= 3.91x10 -7 m

7 Skills Practice 11 1)There is no such thing as an f sublevel in the third energy level. Also, an f sublevel if it existed would have seven orbitals instead of four. 2)8 3)10 4)2 5)Orbitals = 9Electrons =18 6)50 7)4p

8 Skills Practice 13 1)a. ends in: 3d b. ends in: 4d c. ends in: 4p 2) a. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 4 b. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 3 c. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3) Because of Hund’s Rule the 2p sublevel should look like: 1s 2s 2p 4) Three

9 Skills Practice 14 1.a. 5 b. 2c. 6d. 8e. 7 2.a b. 2-6c Column 14 or IVA 4.a. 5 dotsb. 2 dotsc. 4 dotsd. 7 dots

10 Skills Practice 15 1.Abbreviated electron configurations: a.[Ar] 4s 2 3d 10 4p 2 b.[Xe] 6s 2 c.[Ar] 4s 2 3d 10 4p 5 d.[Xe]6s 2 4f 14 5d 10 6p 3 e.[Ar] 4s 2 3d 5 f.[Xe]6s 2 4f 14 5d 9 2.Column 6 (or VIB) 3.5 th row 4.3 rd row 5.Each d sublevel can hold 10 electons 6.Each p sublevel can hold 6 electrons

11 Skills Practice 16 1.The second energy level feels a +13 charge and the outer energy level feels a +5 charge. 2.Sulfur’s outer level of electrons feels a +6 charge pulling on it from the nucleus. Silicon’s outer level feels a weaker charge of +4 and therefore it is not pulled as close to the nucleus as sulfur’s outer level. 3.Chlorine is lower in the periodic table which would indicate that it is larger than lithium, but it is also located further to the right which would indicate that it is smaller. 4.a) S, Al, Mg, Nab) C, Si, Sn, Pb c) Br, Se, Ca, Kd) C, B, Be, Mg, Ca e) Cl, P, Al, Gaf) Ne, O, S, Se

12 Skills Practice It is relatively hard to remove the first electon. 2. a) Ca, As, Se, Brb) Bi, As, P, N c) Ga, Al, Si, Sd) K, Li, C, O e) Po, Te, S, Oe) In, Sn, Te, I 3. Beryllium; After its two outermost electrons are removed, the next electron would need to be removed from an inner energy level, which is much more difficult. 4. Larger atoms tend to have smaller first ionization energies because the outer electrons are farther from the nucleus. Since the electrons are farther, the force of attraction from the nucleus is less.

13 Skills Practice 18 1.Fluorine atom: 2-7; Fluorine ion: ; all atoms have a neutral charge , -1, -1, +2, +1, +2, +3, -3, -2, -1, +2, +1

14 Skills Practice 19 1.Ion Symbol a.P -3 b.Mg +2 c.Rb +1 d.F -1 e.Al +3 f.S -2 2.Rewrite a.BaS b.Rb 3 N c.LiCl d.AlN e.MgBr 2 f.Al 2 O 3 3.Formulas a.Na 2 S b.AlCl 3 c.Ca 3 P 2 d.BaO 4.Names a.Sodium sulfide b.Aluminum chloride c.Calcium phosphide d.Barium oxide 5.+1, +2, +3, +/-4, -3, -2, -1

15 Skills Practice 20 1.LiC 2 H 3 O 2 2.Na 3 PO 4 3.Mg(OH) 2 4.Omit 5.(NH 4 ) 2 S 6.K 2 O 7.AlPO 4 8.NaOH 9.Omit 10.Omit 11.Calcium oxide 12.Barium chloride 13.Potassium phosphate 14.Magnesium hydroxide 15.Omit 16.Sodium acetate 17.Lithium sulfate 18.Ammonium sulfate 19.Aluminum cyanide 20.Beryllium chlorate

16 Skills Practice 21 1.MnF 4 2.(NH 4 ) 3 PO 4 3.Ni(NO 3 ) 2 4.Na 3 N 5.Al 2 (SO 4 ) 3 6.Cr(OH) 3 7.Fe 3 (PO 4 ) 2 8.CuCl 2 9.Copper(II) oxide 10.Iron(II) sulfate 11.Ammonium sulfide 12.Nickel(II) Phosphate 13.Chromium(III) hydroxide 14.Barium chlorate 15.Manganese(IV) nitride 16.Copper(I) carbonate

17 Skills Practice 22 1.Dinitrogen pentoxide 2.Triphosphorus heptoxide 3.Trisulfur tetrafluoride 4.Carbon dioxide 5.Dinitrogen hexoxide 6.Copper(II) sulfate 7.Ammonium carbonate 8.Sulfur hexafluoride 9.H 2 O 4 10.N 3 S 5 11.CO 2 12.N Fe(NO 3 ) 2 14.CCl 4 15.C 3 H 7 16.H 3 PO 4 17.NO 2 18.CH 2 19.C 6 H 9 O 20.N 2 H 3 O 2 21.S 2 O 7 22.C 4 H 3 O 4

18 Skills Practice 28

19 Skills Practice 29

20 Skills Practice 30 1)7.02 x molecules 2)1121 grams 3)Quantity of particles needed to equal an element’s atomic mass in grams. 4)1180 grams 5)183.4 amu; g/mol 6)3.32 moles 7)1.22 x atoms 8)78.6 g/mol 9)4655 grams 10)1.81 x molecules

21 Skills Practice 31 1)15.4% 2)a- 25.8%b- 64.7% 3)a- 53.8%b- 34.4% 4)N 2 O 5 5)N 3 O 6 6)a- C 3 H 4 Ob- C 24 H 32 O 8 7)C 18 H 27 O 36

22 Skills Practice 32 1)35.0 g 2)345 g LiNO 3 ; 100 g Ca 3)117 g Na 3 P; 239 CaSO 4 4)181.7 g Al(NO 3 ) 3 ; 142 g CaCl 2 5)41.8 g of each product


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