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kompoz [17]
3 years ago
15

A radioactive element has a half-life of 1,000 years. If a sample of this element begins with a mass of 20 grams, how long would

you have to wait for the mass to decrease to 5 grams?
A. 2,000 years
B. 500 years
C. 250 years
D. 1,000 years
Geography
1 answer:
Fynjy0 [20]3 years ago
7 0

A radioactive element with a half-life of 1,000 years, and starting mass of 20 grams, will need 2,000 years to decrease to 5 grams.

Explanation:

The radioactive elements all have a specific half-life. Each element's half-life is well known, and they are used by scientists of numerous fields as they are excellent for determining the age of a particular item, be it or organic or non-organic nature. In this case, we have a radioactive element with a half-life of 1,000 years, and starting mass of 20 grams.

The half-life basically means that half of the mass of an element is lost during a particular period of time. For the element in question we need to find out how much time will be needed for it to decrease to 5 grams. In order to get to the result, we just need to add 1,000 years on every decrease of half of the mass:

20/2 = 10

10/2 = 5

So in 1,000 years, the element in question will decrease to 10 grams, and in further 1,000 years (2,000 cumulatively) it will decrease to 5 grams.

Learn more about radioactive decay brainly.com/question/9796067

#learnwithBrainly

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Explanation:

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While most of the provinces and territories have nothing against being in the borders of Canada, there is one that opposes it, that being Quebec. Quebec is one of the provinces that contributes the most to the GDP of the country, is one of the most populous, and has an excellent location.

This province doesn't want to be in the borders of Canada though, but instead wants to be independent. The main reasons for that are that the majority of the people of Quebec have different ethnic and cultural background than the rest of the provinces and territories. While the people of Quebec already had several referendums about independence, with the majority of the population voting for it, the Canadian highest court declared any attempts for seceding of Quebec illegal in 1998.

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6 0
3 years ago
What are some advantages and disadvantages of using nuclear power?<br> need at least 2 for each one
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4 0
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ElenaW [278]

Answer:

This is an example of adaptation and enviromental pressure.

Explanation:

Say you were to move to somewhere where the climate is nothing like you are used to. You would have to adapt to the new climate. The animals in the Boreal forest have to adapt to the climate and know they don't get food in the winter.

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Dafna1 [17]

Answer:

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Explanation:

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Juli2301 [7.4K]

Answer:

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Explanation:

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