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Author Question: Main group elements are those in groups ________. (Read 59 times)

shofmannx20

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on: Jul 8, 2021

Question 1

Magnesium has 3 stable isotopes with masses of 23.98504, 24.98584, and 25.98259 respectively. Mg-25 is 10.13%. What are the percentages of the other two isotopes?
◦ 78.8% and 10.9%
◦ 50% and 50%
◦ 44.9% and 44.9%
◦ 83.6% and 16.4%
◦ 78.9% and 21.1%

Question 2

Main group elements are those in groups ________.
◦ 1 and 2
◦ 1, 2, and 13 to 18
◦ 13 to 18
◦ 1 and 18
◦ 3 to 12
General Chemistry: Principles and Modern Applications ¦ Petrucci, Herring, Madura, Bissonnette ¦ 11th Edition
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Marked as best answer by shofmannx20 on Jul 8, 2021

hollysheppard095

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Reply #1 on: Jul 8, 2021
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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shofmannx20

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Reply 2 on: Jul 8, 2021
Excellent

coreycathey

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Reply 3 on: Yesterday
Gracias!

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