Question

222 Rn 86 is an isotope of noble gas, radon. How many protons, neutrons and electrons are there in one atom of this radon isotope?

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Answer

Atomic number of radon = 86

The number of protons = 86

The number of electrons = Number of protons

= 86

Number of neutrons = Atomic mass – Atomic number

= 222 – 86

= 136

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