Question and answer
Determine the average atomic mass of helium, which has two isotopes having atomic masses 4.0026 amu and 3.0160 amu. The relative abundance of the two isotopes is 99.9999 percent and 0.0001 percent,
respectively.
Isotopes are atoms that have the same atomic number but a different mass number.
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Original conversation
User: Determine the average atomic mass of helium, which has two isotopes having atomic masses 4.0026 amu and 3.0160 amu. The relative abundance of the two isotopes is 99.9999 percent and 0.0001 percent, respectively.

Weegy: Isotopes are atoms that have the same atomic number but a different mass number.
LatimD0ll|Points 40|

User: determine the average atomic mass of nitrogen.

User: An element X has two isotopes. X-15 has 7 protons and 8 neutrons. Determine the atomic number and mass number of the second isotope, which has 10 neutrons in its nucleus.

Weegy: Atomic number - 7 Mass number - 17
Expert answered|lena.G|Points 11|

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Asked 4/15/2013 4:36:04 PM
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