Beryllium-9 has 9 nucleons.
The neutral radium atom has 88 electrons, the radium cation has 86 electrons.
Radium has seven electron shells.
Radium has today 33 isotopes and 12 nuclear isomers.
There are A + Z nucleons in an element
Beryllium-9 has 9 nucleons.
238 nucleons in 238U.
The "11" refers, precisely, to the number of nucleons.
Radium has 88 protons.
Radium has seven electron shells; the valence of radium is 2+.
There is no such atom as Radium 87 - it is Radium 88 and thus has 88. Francium is 87.
Radium has one valence electron.
Radium has two valence electrons.
The Radium Pool has 188 pages.
The neutral radium atom has 88 electrons, the radium cation has 86 electrons.
Radium has seven electron shells.