Determine the percent abundance for J-67 and J-68, given the following data: The average atomic mass for J is 65.96 amu. Atomic % Isotope weight abundance J-64 63.9296 6.744 J-66 65.9449 90.654 J-67 66.9154 ?? J-68 67.9113 ??

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**Determine the percent abundance for J-67 and J-68, given the following data:**

The average atomic mass for J is 65.96 amu.

| Isotope | Atomic weight | % abundance |
|---------|---------------|-------------|
| J-64    | 63.9296       | 6.744       |
| J-66    | 65.9449       | 90.654      |
| J-67    | 66.9154       | ??          |
| J-68    | 67.9113       | ??          |

**Instructions:**

To find the percent abundance for isotopes J-67 and J-68, use the weighted average formula for atomic masses and solve for the unknown abundances. Remember that the total abundance of all isotopes adds up to 100%.
Transcribed Image Text:**Determine the percent abundance for J-67 and J-68, given the following data:** The average atomic mass for J is 65.96 amu. | Isotope | Atomic weight | % abundance | |---------|---------------|-------------| | J-64 | 63.9296 | 6.744 | | J-66 | 65.9449 | 90.654 | | J-67 | 66.9154 | ?? | | J-68 | 67.9113 | ?? | **Instructions:** To find the percent abundance for isotopes J-67 and J-68, use the weighted average formula for atomic masses and solve for the unknown abundances. Remember that the total abundance of all isotopes adds up to 100%.
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Isotopes which have same  number of protons but different number of neutrons.

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