How many neutrons does the most common isotope of potassium have?

When the boron isotope ( 5 10B) is bombarded with neutrons, it absorbs a neutron and then emits an alpha ...?

  • When the boron isotope ( 5 10B) is bombarded with neutrons, it absorbs a neutron and then emits an alpha particle. Identify the isotope that is formed in this process.

  • Answer:

    10B5 + 1n0 → A?Z + 4He2 The numbers need to balance. 10+1 = A+4, so A = 11-4 = 7. Also, 5+0 = Z+2, so Z = 5-3 = 3 The missing isotope is lithium-7, 7Li3.

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