is the mass number of a molecule simply the sum of the mass numbers of its constituent atoms?

... equal to Z + N (Figure 2). The mass of the nucleus in atomic mass units (amu) is usually slightly different from the mass number. Atoms of the same element ... Aug 29, 2024 ... The atomic mass is the average number of protons and neutrons for all natural isotopes of an element. It is a decimal number. Atomic mass value ... The atomic number of an element states the number of protons in the nucleus of every atom of that element. The number of electrons in an atom is equal to the ... The mole allows scientists to calculate the number of elementary entities (usually atoms or molecules ) in a certain mass of a given substance. Avogadro's ... ATOMIC MASS NUMBER (A) - A number equal to the number of nucleons (neutrons plus protons) within the nucleus of an atom. ATOMIC MASS UNIT (amu) - The atomic ... No, the mass number of an atom is not equal to the number of electrons. The mass number is the sum of the number of protons and neutrons in the nucleus of ... ... equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the ... May 16, 2018 ... The mass number is the sum of protons and neutrons. The atomic mass is the weighted average of the masses of individual elements weighted by abundance. Each atom also has a mass number, denoted by the symbol A. The mass number of an atom is equal to the number of protons plus the number of neutrons that it ... Specifically, the atomic number corresponds to the number of protons found in the nucleus of an atom. Since each element on the periodic table has a unique ...