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There u go. the valence electrons can be no more than eight on the first ring and you only have 4
1-. Because Group 7A elements have 7 electrons in their valence shell, they need 1 more electron to complete the octet. Thus, it is generally true that all Group 7 electrons have an oxidation number of 1-. This also explains why electron affinity is largely the highest for Group 7A and lowest for Group 1A.
Answer:
800 g
Explanation:
We can express the decay of I-37 using the formula:
- Final Mass = Initial Mass *
We <u>input the data</u>:
- 25 g = Initial Mass *
And <u>solve for Initial Mass</u>:
- 25 g = Initial Mass *
- 25 g = Initial Mass * 0.03125
Meaning that out 800 grams of I-37, only 25 will remain after 40.35 days.