How many protons are in an atom represented by $_{88}^{220} R a$ $""_88^220Ra$ ?

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Answer 1 · 2016-05-01T14:49:20

If it is a radium isotope, then there are $88$ $88$ $nucular$ $"nucular"$ protons.

The number of protons determines elemental identity: for radium $Z = 88$ $Z=88$ . We don't even need the subscripted symbol to determine this.

A more searching question would have been to ask how many NEUTRONS this isotope contains. Well, how many?

How many protons are in an atom represented by 22088Ra""_88^220Ra?