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yan [13]
2 years ago
14

If you have one kilogram of radionuclide, how much will remain after one half-life has passed?

Chemistry
1 answer:
const2013 [10]2 years ago
7 0
If we start with 1 kg or 1000 g of radionuclide, after one half-life has passed, one-half of the original amount of radionuclide will remain. Therefore, 500 g of the radionuclide will remain. The half-life is the time it takes for a radioactive substance to decay to half its initial amount.
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an element has a metallic gray appearance. it also has the properties of both a metal and a nonmetal. in which section of the pe
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Chlorine has two naturally stable isotopes: 35Cl (34.968853 amu) and 37Cl (36.965903 amu). The natural abundance of each isotope
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Answer:

35Cl ⇒ 34.968853 amu  has an abundance of 30.05%

Explanation:

The molar mass of chlorine, (which is the average of all its naturally stable isotope masses), is 36.36575 amu.

There are 2 naturally stable isotopes, this means together they have an abundance of 100%

The isotopes are:

35Cl ⇒ 34.968853 amu  has an abundance of X %

37Cl ⇒ 36.965903 amu  has an abundance of Y %

X + Y = 100%   OR X = 100% - Y

36.36575 = 34.968853X + 36.965903Y  

36.36575 = 34.968853(1-Y) + 36.936.96590365903Y

36.36575 = 34.968853 -34.968853Y + 36.965903Y

1.396897 = 1.99705Y

Y = 0.699 = 69.95%

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To control, we can plug in the following equation:

34.968853 * 0.3005 + 36.965903 * 0.6995 = 36.3658

This means

37Cl ⇒ 36.965903 amu  has an abundance of 69.95 %

35Cl ⇒ 34.968853 amu  has an abundance of 30.05%

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