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Marizza181 [45]
3 years ago
8

Nonmetals gain electrons under certain conditions to attain a noble-gas electron configuration. how many electrons must be gaine

d by the element c?
Chemistry
1 answer:
r-ruslan [8.4K]3 years ago
8 0
System is said to have achieved noble-gas configuration, when it's valance shell is completely filled.

Atomic number of carbon is 6. Thus, it has 6 electrons.

The electronic configuration of carbon is 1s2 2s2 2p2

Now, the inert gas closest to C is Ne, whose atomic number is 10.

Thus, there are excess of 4 electrons in Ne as compared to C.

Hence, carbon must gain 4 electrons to achieve noble-gas configuration.

Alternatively,  C can also lose 4 electron to achieve noble gas configuration of He.
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Answer:

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Explanation:

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In this case, since the given number has five significant figures as the zero is to the right of the first nonzero digit (3), if it is required to report it with three significant figures, it is necessary to "cut" it at the first five without any rounding since the subsequent zero is less than five.

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