Which is the heaviest element produced in large stars by nuclear fusion near the end of their life cycle?

Chemistry

2 answers:

Rama09 [41]9 months ago

6 0

Iron is the heaviest element produced in large stars by nuclear fusion near the end of their life cycle .

<h3>What do you mean by the nuclear fusion ?</h3>

Nuclear fusion is the process by which two light atomic nuclei combine to form a single heavier one while releasing massive amounts of energy.

The main advantage of nuclear fusion is it is safe source for the generation of electricity.

Characteristics of nuclear fusion -:

The main characteristic of nuclear fusion is that it involves formation of a singular particle from two or more atoms.

Unlike nuclear fission, nuclear fusion is common in nature- just hard to recreate.

Nuclear fusion typically produces few radioactive particles .

Fusion works by applying a great deal of pressure to overcome .

Hence ,Iron is the heaviest element produced in large stars by nuclear fusion near the end of their life cycle .

Learn more about nuclear fusion ,here:

brainly.com/question/12701636

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Sholpan [36]9 months ago

4 0

Answer:

The lightest elements in the universe — hydrogen, helium, and a little lithium — were born shortly after the Big Bang.

Explanation:

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Draw the major organic substitution product(s) for (2R,3S)-2-bromo-3-methylpentane reacting with the given nucleophile. Indicate

Andrew [12]

Answer:

(2R,3S)-2-ethoxy-3-methylpentane

and

(2S,3S)-2-ethoxy-3-methylpentane

Explanation:

For this case, we will have $CH_3CH_2O^-$ as nucleophile. Also, this compound is also in excess. So, we will have as solvent $CH_3CH_2OH$ a protic solvent. Therefore the Sn1 reaction would be favored.

The first step would be the carbocation formation followed by the attack of the nucleophile. In this case both isomers would be produced: R and S (see figure).