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Zinaida [17]
3 years ago
8

If 50% of radioactive element remains after 4000 years what what is the half life

Chemistry
1 answer:
In-s [12.5K]3 years ago
7 0
4,000 years is the half life of that element. Nope 8,000 years, there will be 25% remaining
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ale4655 [162]

Answer: Option (b) is the correct answer.

Explanation:

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Therefore, it is an endothermic reaction.

Thus, we can conclude that the statement, it is endothermic because the energy required to break bonds in the reactants is greater than the energy released when the products are formed is correct.

5 0
3 years ago
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Identical twins will have the e physical features such as hair color and eye color, because they were formed from the exact same egg and sperm. Fraternal twins are formed from two different eggs and sperm, so those twins will look different from each other.

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Harlamova29_29 [7]

Answer:

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What are the 5 ways to identify if a chemical reaction happened?
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