What are the stable isotopes of boron?

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A color-coded periodic table of the elements displays each element's symbol and atomic number, with categories such as alkali metals, noble gases, halogens, transition metals, and actinoid elements distinguished by different background colors. — boron group element Modern version of the periodic table of the elements (printable).

In nature, boron consists of a mixture of two stable isotopes:

Boron-10: Comprises approximately 19.9 percent of naturally occurring boron.12
Boron-11: Comprises approximately 80.1 percent of naturally occurring boron.12

These stable isotopes are utilized in nuclear magnetic resonance spectroscopy, and the boron-10 isotope is particularly notable for its high capacity to capture thermal neutrons, a property leveraged in applications such as neutron shielding and boron neutron capture therapy for treating certain tumors.1