11 grade chemistry others
What is the mass number of boron?
What is the mass number of boron?
1 Answer
Askiitians Tutor Team
The mass number of boron is typically 10 or 11. Boron has two stable isotopes:
Boron-10 (10B) has a mass number of 10, which means it has 5 protons and 5 neutrons.
Boron-11 (11B) has a mass number of 11, which means it has 5 protons and 6 neutrons.
These two isotopes have different numbers of neutrons but the same number of protons, making them isotopes of boron with slightly different atomic masses. Boron-10 is the more common isotope, accounting for approximately 19.9% of naturally occurring boron, while boron-11 makes up the rest.
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