Each isotope has a different number of neutrons; Ac-227 has 138 neutrons.
Number of neutrons = Mass number of an isotope - Atomic number of the element
There are 138 neutrons in actinium 89. Thank you for using WikiAnswers:)
The number of neutrons is the difference between the atomic mass of an isotope and the atomic number. Actinium has a great number of isotopes, each with a different mass or number of neutrons.
Actinium has 89 protons and electrons; the natural isotope 227Ac has 138 neutrons.
Actinium has 89 protons and 138 neutrons (the natural isotope 227Ac).
The natural isotope 227Ac has 138 neutrons.
227Ac (natural actinium) has 89 protons and electrons; also 138 neutrons.
The most common isotope of actinium, Ac-227, has 89 protons and 138 neutrons.
The most common isotope of actinium, Ac-227, has 89 protons and electrons and 138 neutrons.
Actinium may be used in actinium-beryllium neutron sources or in radiotherapy.
There are 2 valence electrons in Actinium.
Actinium may be used in actinium-beryllium neutron sources or in radiotherapy.
Actinium may be used in actinium-beryllium neutron sources or in radiotherapy.