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The element Argon has 8 Isotopes argon-35, argon-36, argon-37, argon-38, argon-39, argon-40, argon-41 and argon-42.

The stable isotopes of argon are:

  • argon-36, 0.34%
  • argon-38, 0.06%
  • argon-40, 99.60%

Of the radioactive isotopes argon-39 has the longest halflife at about 260 years, all the others have halflives measured in days or much less.

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7y ago
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11y ago

22 neutrons in Ar-40 isotope.

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8y ago

Seven.

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Q: How many neutons dose argon have?
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