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Author Question: What element was found to be the first superconductor of electricity at 4.2 K in 1911? (Read 63 times)

fox

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on: Feb 15, 2020

Question 1

What is the average oxidation number of Cu in the 1-2-3 superconductor YBa2Cu3O7 if Y is in the +3 oxidation state?
◦ +2.33
◦ +0.67
◦ +2
◦ +4.33

Question 2

What element was found to be the first superconductor of electricity at 4.2 K in 1911?
◦ nickel
◦ mercury
◦ aluminum
◦ gallium
Chemistry ¦ McMurry, Fay, Robinson ¦ 7th Edition
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Marked as best answer by fox on Feb 15, 2020

kalskdjl1212

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Reply #1 on: Feb 15, 2020
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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fox

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Reply 2 on: Feb 15, 2020
Excellent

peter

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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