Draw the geometric atomic structure of ${}_{5}^{11}B$ , showing clearly number of neutrons, number of protons and number of electrons.

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Solution

The subscript denotes the atomic number .Thus boron is having atomic number 5.
Atomic number is the number of protons in an atom, hence number of protons=5.
In an electrically neutral atom, number of electrons and protons will be same. Hence number of electrons=5.
Superscript denotes mass number.Mass number is the sum of number of protons and neutrons.
Hence number of neutrons=mass number-number of protons=(11-5)=6.

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Draw the geometric atomic structure of ${}_{5}^{11}B$ , showing clearly number of neutrons, number of protons and number of electrons.