the mass is divided into how many parts
Mass (liturgy) The liturgy is divided into two main parts: The Liturgy of the Word (Gathering, Proclaiming and Hearing the Word, Prayers of the People) and the Liturgy of the Eucharist (together with the Dismissal), but the entire liturgy itself is also properly referred to as the Holy Eucharist. The sequence of the liturgy is almost identical to the Roman Rite, except the Confession of Sin ends the Liturgy of the Word in the Anglican rites in North America, while in the Roman Rite and in Anglican rites in many jurisdictions the Confession is near the beginning of the service.
Isotope The number of protons within the atom's nucleus is called atomic number and is equal to the number of electrons in the neutral (non-ionized) atom. Each atomic number identifies a specific element, but not the isotope; an atom of a given element may have a wide range in its number of neutrons. The number of nucleons (both protons and neutrons) in the nucleus is the atom's mass number, and each isotope of a given element has a different mass number.