13-aluminum Naturally occuring isotopes:
Al-27 ( 100% )
Isotopes:
Al-21 Al-22 Al-23 Al-24 Al-25 Al-26 Al-28 Al-29 Al-30 Al-31 Al-32 Al-33 Al-34 Al-35 Al-36 Al-37 Al-38 Al-39

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