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
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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| D | – | 11 | 12 | – | – |
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| X | Y | |
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