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Neutron

An element B ...

Question

An element B has 5 protons and 6 neutrons. What will be the symbol of the element B?

A

¹¹₆B

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B

11B

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C

⁵₁₁B

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D

¹¹₅B

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Solution

The correct option is D
¹¹₅B

Atomic number of B = Number of protons

= Numer of electrons in the element

= 5

Mass number = Number of protons + Number of neutrons

= 5 + 6

= 11

So, symbol of B:

¹¹₅B

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