what is the mass number equal to?

Jan 12, 2018 ... In this video I go over Atomic Number, Atomic Mass, and Mass Number. These are three chemistry terms you'll definitely have to know for you ... 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 ... (An observant student might notice that the sum of an atom's subatomic particles does not equal the atom's actual mass: The total mass of six protons, six ... The number of electrons in an atom is normally equal to the number of protons in the nucleus. ... Hence the nominal mass, based on the mass number, approximates ... The correct answer is (D) The nucleus contains both protons and neutrons, the sum of which determines the mass number. binary channel by measuring the mass number (A) and total kinetic energy ... number of neutrons equal to 126 (the so-called ”magic numbers”). This ... As the weight of a proton and a neutron is almost equal to 1 amu in every atom, the atomic mass and mass number of an atom are almost the same. The unit amu is ... What is Mass Number? · The number of protons and neutrons combine to give us the mass number of an atom. · It is represented using the letter 'A. · As both protons ... Nov 28, 2023 ... The number of protons is unique to each element. For example, there are six protons in a carbon nucleus; therefore, its atomic number is 6 on ... Mar 26, 2025 ... Mass number is always equal to the sum of the number of protons and the number of neutrons. Electrons: Protons: