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The exact contribution varies from atom to atom, since different atoms have different numbers of neutrons. However, in a simple system of one proton, one electron, and one neutron (called a deuterium atom), the neutron contributes roughly as much as the proton does, since its mass is almost (but not quite; the neutron is heavier) equal to that of the proton. To be precise, as listed at http://www.newton.dep.anl.gov/askasci/gen01/gen01078.htm,
Mass of proton : 1,6726 x 10^(-27) kg
Mass of neutron: 1,6749 x 10^(-27) kg
Mass of electron: 0,00091x10^(-27) kg
What else can I help you with?
What is the total amount of protons and neutrons in an atom?
The total amount of protons and neutrons in an atom is its mass number.
The atomic mass of an atom is determined by the combined masses of its what?
The atomic mass of an atom is determined by the combined masses of its protons, neutrons, and electrons. While electrons contribute very little to the atomic mass, the protons and neutrons, found in the nucleus, account for the majority of an atom's mass.
Atomic mass of an atom is determined by the weight of?
The atomic mass of an atom is determined by the total number of protons and neutrons in its nucleus. Protons and neutrons contribute to the majority of an atom's mass, electrons have negligible mass in comparison. The atomic mass unit (amu) is used to express atomic mass, with 1 amu approximately equal to the mass of a proton or neutron.
What is the mass of an atom with 34 protons 34 electrons and 45 neutrons?
The mass of an atom is primarily determined by the sum of its protons and neutrons, as electrons contribute negligible mass. In this case, the atom has 34 protons and 45 neutrons, giving it a total nucleon count of 79. The atomic mass is approximately 79 atomic mass units (amu), assuming the mass of protons and neutrons are roughly 1 amu each. Thus, the mass of the atom is about 79 amu.
What particle determines the mass of a atom?
the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.
What is the total amount of protons and neutrons in an atom?
The total amount of protons and neutrons in an atom is its mass number.
The atomic mass of an atom is determined by the combined masses of its what?
The atomic mass of an atom is determined by the combined masses of its protons, neutrons, and electrons. While electrons contribute very little to the atomic mass, the protons and neutrons, found in the nucleus, account for the majority of an atom's mass.
What particles make up the mass of the atom?
Protons and neutrons, the particles that make up atomic nuclei, are the ones responsible for almost all of the mass of an atom. As the electron has less than 1/1800th the mass of a proton, a whole flock of electrons won't significantly change the mass of an atom. We look to the protons and neutrons (called nucleons when they are being considered as components of an atomic nucleus) to contribute to the mass of an atom, and they will be considered when we derive the atom weight of an element.
Which particles in an atom contribute most to mass of the atom?
The particles are protons, neutrons, and the nucleus inside of the atom Nice helping u >_<
What is the number of neutrons in an atom affects the atomic what?
The number of neutrons in an atom can affect the atomic mass of an atom.
What is the total mass of the protons and neutrons in an atom called?
The total mass of the protons and neutrons in an atom is called the atomic mass or mass number. It is often represented by the symbol A.
Atomic mass of an atom is determined by the weight of?
The atomic mass of an atom is determined by the total number of protons and neutrons in its nucleus. Protons and neutrons contribute to the majority of an atom's mass, electrons have negligible mass in comparison. The atomic mass unit (amu) is used to express atomic mass, with 1 amu approximately equal to the mass of a proton or neutron.
What is the mass of an atom with 34 protons 34 electrons and 45 neutrons?
The mass of an atom is primarily determined by the sum of its protons and neutrons, as electrons contribute negligible mass. In this case, the atom has 34 protons and 45 neutrons, giving it a total nucleon count of 79. The atomic mass is approximately 79 atomic mass units (amu), assuming the mass of protons and neutrons are roughly 1 amu each. Thus, the mass of the atom is about 79 amu.
What particle determines the mass of a atom?
the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.
The weight of an atom is the weight of its?
The weight of an atom is primarily determined by the total number of protons and neutrons in its nucleus. Electrons, which have negligible mass, also contribute to the atom's weight but to a much smaller extent.
How do you define the atomic mass of an element?
The total mass of the atom. In other words the total mass of the protons and neutrons of an atom
What is the sum of protons and neutrons in an atom?
Mass number!:)
