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Question

What is the mass number and the atomic number of Boron-11?


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Solution

Step 1. Formula for atomic number:

  • Atomic number(Z)=Number of protons in the nucleus of an atom

Step 2. Mass number of Boron-11:

  • The name Boron-11 is used to designate an isotope of boron that has a mass number equal to 11.
  • So, the mass number of Boron-11 is 11.

Step 3. Atomic number of Boron-11:

  • The number of protons in Boron-11 is 5.
  • So, the atomic number of Boron-11 is 5.

Hence, the mass number and the atomic number of Boron-11 is 11and 5 respectively.


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