When you digest the starch found in a cracker using enzymes in your saliva, a
reaction breaks the bonds by ADDING water.
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Help plz

Protactinium has no stable isotopes.

Explanation:

Isotopes: Protactinium has 27 isotopes whose half-lives are known, with mass numbers 212 to 238. Protactinium has no stable isotopes. Its longest lived isotopes are 231Pa, with a half-life of 32,760 years, 233Pa with a half-life of 26.967 days and 230Pa with a half-life of 17.4 days.

(i used this website: https://www.chemicool.com/elements/protactinium.html )