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Julli [10]
3 years ago
10

two atoms have the same number of protons but different number of neutrons. what can you conclude about these masses

Chemistry
1 answer:
Marina CMI [18]3 years ago
7 0
These masses are isotopes. By definition, isotopes of an element have the same number of protons as the given element, but different numbers of neutrons.
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How much of a 400g sample remains after 4 years if a radioactive isotope has a half-life of 2 years?
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100 g

Explanation:

From the question given above, the following data were obtained:

Original amount (N₀) = 400 g

Time (t) = 4 years

Half-life (t½) = 2 years

Amount remaining (N) =?

Next, we shall determine the number of half-lives that has elapse. This can be obtained as follow:

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Half-life (t½) = 2 years

Number of half-lives (n) =?

n = t / t½

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n = 2

Thus, 2 half-lives has elapsed.

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N = 1/2ⁿ × N₀

N = 1/2² × 400

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N = 0.25 × 400

N = 100 g

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What is defined as the ability to do work or to cause changes in matter?
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Explanation:

All the answers for you!

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