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Author Question: How many valence electrons does bromine (Br, atomic no. = 35) have? A) 1 B) 7 C) 21 D) 28 E) ... (Read 115 times)

charchew

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on: Jul 29, 2018
How many valence electrons does bromine (Br, atomic no. = 35) have?
 
  A) 1
  B) 7
  C) 21
  D) 28
  E) 35

Question 2

A 17-mm-wide diffraction grating has rulings of 530 lines per millimeter. White light is incident normally on the grating. What is the longest wavelength that forms an intensity maximum in the fifth order?
 
  A) 377 nm
  B) 352 nm
  C) 402 nm
  D) 427 nm
  E) 452 nm
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Kedrick2014

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Reply #1 on: Jul 29, 2018
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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charchew

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Reply 2 on: Jul 29, 2018
Thanks for the timely response, appreciate it

irishcancer18

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Reply 3 on: Yesterday
Excellent

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