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Iculate the pm). (a) density of aluminum metal. 12.40 An element crystallizes in a face-centered cubic lattice. The edge of the unit cell is 0.408 nm, and the density of the crys- tal is 10.49 g/cm3. Calculate the atomic weight of the ele- Islom ment and identify the element. .

有人知道我是哪裡算錯嗎(ಥ_ಥ)

= 78, When the electron in a hydrogen atom falls from the n= 3 excited energy level to the ground state energy level, a photon with wavelength 2 is emitted. An electron having x this same wavelength would have a velocity of A) 7.10 x 10 m/s. D) B) 2.93 x 10 m/s. E) C) 2.93 x 103 m/s. Ans: A Category: Medium Section: 7.4 7.10 m/s. 3.00 x 108 m/s.

請問第68題要怎麼看

Ans: B Section: 7.9 75. Category: Medium E 66. A ground-state chromium atom has how many unpaired electrons? (58) 24 A) 1 B) 2 C) 4 D) 5 E) 6 IS2537355P 3843 Category: Medium Section: 7.9 Ans: E 16. atom? 67. Which of the following is the electron configuration of an excited state of an oxygen C A) 1s22s22p4 B) 1s 2s²2p" C) 1822s22p%35' D) 1s22s22p E) 1s22s22p3 Category: Medium Section: 7.9 Ans: C 68. Which of the following is the electron configuration of an excited state of an iron atom? A) [Ar]45²3d? B) [Ar]4s 3d C) [Ar]4s3d8 D) [Ar]4s'3d? E) [Ar]4s 3d Ans: D Category: Medium Section: 7.9 7 CM 1453

第一題：有人能教我，這個電子填的順序要怎麼做？我的想法是同個方向的先填，再填反方向的，然後補滿嗎？ 第二題：請問遇到像紅色圈起來的滿的電子該怎麼做？是一整個填進中間空的圈圈嗎？ಠ~ಠ

N2 Atom Molecule Atom 2p 2p Energy TT 2p 2s 2s

為什麼不是E

Q搜尋 07.pdf Chapter 7: Atomic Structure and Periodicity 1. When ignited, a uranium compound burns with a green flame. The wavelength of the light given off by this flame is greater than that of A) red light B) infrared light C) radio waves D) ultraviolet light E) gamma rays ANS: D PTS: 1 DIF: Easy REF: 7.1 KEY: Chemistry | general chemistry | atomic theory light | electromagnetic radiation MSC: Conceptual 2. Which form of electromagnetic radiation has the longest wavelengths? A) gamma rays

求解第6題謝謝☺ 祝您考試全all pass

% 86.5 N A 3 从目兄界」,如果一粒細沙直徑1mm,原子直徑約0.1mm,請估算一粒沙約有幾個原 子數目? (A) 10° (B) 10° (C) 101 (D) 107 (E) 10 。 | latom 【答】 (E) 3 29 tanlyn tho 5. 將一石子放入盛滿甲液體的燒杯,結果溢出 96公克;若改放入盛滿乙液體的燒杯時,蓋出的乙液 體為108 公克,設甲液體的密度為0.8公克/公分,則乙液體的密度為何?(A)0.90 公克/公分 (B) 0.85 公克/公分: (C) 0.75 公克/公克(D) 1.2 公克/公分: (E)1.5 公克/公分 <叶 [ 96 108x0.8 【答】(A) - Dz= b 0.8 Dz 6. 用天文單位為單位去測量兩恆星之間的距離,所測得之數值為a。用光年為單位去量測,所得數值 為b。用天文單位來量光年得c,則 (A)a=b+c (B)b=c+a (C) a=bc (D)b = ca (E)c= ab。 a (A.U) 0 w义單位量无年 【答】(C) a (A.U)= 6(69) 物。 C-1(2.1 [ 1 (A.U) 108 4 錄製聲 bleg) a=b (ly (4.c) = b.C 單位臺 - 5

D哪裡錯了，求解謝謝

一: 難易度大大大 重要性大大 4.596. ...A 汉 (D)鈾的氧化物應該是U308,鈾的原子量為80。 4. 英國化學家約翰·道耳頓於1802年提出了原子說(atomic theory),主要有 以下五個論點: B(1) 所有的物質是由稱為原子的極小粒子所組成 (2)構成同種元素的原子質量與性質相同;不同元素的原子質量與性質不同 (3) 原子無法被分割 (4) 不同元素的原子以簡單整數比結合成化合物 (5) 在化學反應中,原子被重新排列 而以現代科學的觀點來修正,下列敘述中哪些是正確的? (A)一般化學物質中,有些並非原子所組成 (B)同位素彼此間有不同的質量 (C)原子可被分割成電子、質子與中子 (D)能夠出現如HOO.978 或 NH1.23 之類的穩定粒子 TE)一般化學反應中,原子有可能消失或被創造出來。

EDTA滴定，求解🙏

2. Titration of Ca2+ and Mg2+ in a 50.00-ml sample of hard water required 23.65 mL of 0.01205 M EDTA (C10H16N203). Calculate the hardness of the water sample, expressed as ppm CaCO3 Element Ca Mg C H N o Atomic Mass (g/mol) 40.08| 24.31|12.01|1.008| 14.01|16.00

求C D選項詳解謝謝

氣體 9 4 atom A batm B 0 ACE | 15℃時,附圖中,容器A、B間以一體積可忽略不計的細管相連,活检C | 關閉時,A容器內裝有壓力為4 atm 的NB容器內裝有壓力為6 atm 的 | 0 富活检C開啟後,容器內壓力變為5.4 atm,則下列敘述哪些正確? 141A、B容器的壓力比為1:1 BA、B容器的體積比為1:2 OA、B容器內N 的分壓均為1.2 atm CD NO. 的莫耳數比為3:7 DA、B容器的體積莫耳濃度比為1:1。 (B) punkt pvan noy 5:4 (VATVB )= 4 VA + 6 VB 6x n = Poz x10 , Puz= 4.2 1 4V4 = 0,6 Vé =VA: VB = 3:n PNZ 112 PUz 412 (C) PV=nRT bv= ( (6) Prenat 4x3 = PN₂ x 10 - PN₂=1.2 6 PN2 No por

52.53

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