The electrons in actinium are disposed on seven energy levels.
Actinium has seven electron shells.
Actinium has seven electron shells.
Actinium has seven electron shells.
The electrons in actinium are disposed on seven energy levels.
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 three valence electrons.
There are 138 neutrons in actinium 89. Thank you for using WikiAnswers:)
The electrons in actinium are disposed on seven energy levels.
Actinium has 89 protons and 138 neutrons (the natural isotope 227Ac).
There are 2 valence electrons in Actinium.