The most common isotope of actinium, Ac-227, has 89 protons and 138 neutrons.
A beryllium nucleus typically contains four protons and four neutrons, making a total of 8 particles in its nucleus.
13
there are 80 protons in the nucleus of an atom of mercury
the particles in the nucleus are Neutrons
Actinium has seven electron shells.
All the isotopes of actinium has 89 protons.
One atom; actinium is an element, not a molecule.
All the isotopes of actinium has 89 protons.
Actinium has seven electron shells.
Actinium has seven electron shells.
Actinium has three valence electrons.
The electrons in actinium are disposed on seven energy levels.