can the mass number change during a chemical reaction?

Mar 1, 2001 ... Number of electrons is normally equal to the number of protons ... A is the mass number - number of protons (Z) plus the number of ... Oct 5, 2024 ... The atomic number is the number of protons in an element, while the mass number is the number of protons plus the number of neutrons. 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 ... 2) Mass Concentration. The mass concentration of a solution is equal to the mass ... The number of moles we started with is equal to the number of moles of ... Apr 30, 2020 ... The mass number of an atom is equal to the total number of protons and neutrons collectively called nucleons in the nucleus of an atom. Upvote ·. Having numbers of chromosomes not equal to exact multiples of the haploid number ... mass number; chemical properties of isotopes of a particular element are ... 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. of nuclei with mass number A, τ Aγ = λAγ /c ≈ 30/A s, is much smaller than ... are equal to the Lorentz factors of the parent nuclei γ A = γ n. Neu ... Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. If you want to calculate how ... The number of protons plus the number of neutrons in a nucleus determines an element's “baryon number,” which is nearly equal to the atomic mass of that element ...