The majority of an atom's mass comes from its nucleus, where the protons and neutrons are joined. The electrons of an atom are so distant and so minuscule in size, that their weight is negligible. When calculating the mass of an atom is therefore protons+neutrons.
Almost all of the volume of an atom has no mass.
Approximately all of the atom's mass is in the nucleus. The electrons contribute almost zero.No atom has more than 100 electrons, but eachproton or neutron in the nucleushas the mass of more than 1,800 electrons.
The great majority of the mass of an atom is found in the nucleus, where protons and neutrons are located. The nucleus is incredibly dense and accounts for almost all of the atom's mass, while electrons, which are much smaller and lighter, contribute very little to the overall mass of the atom.
No, an atom's atomic mass is the sum of the total number of protons and neutrons in its nucleus. Electrons have such a tiny mass that they are usually not included in the calculation of an atom's atomic mass.
The nucleus is the part of the atom made up of protons and neutrons, and it contains nearly all of the atom's mass. Electrons, which have much lesser mass, orbit around the nucleus.
It is the mass number for that particular form of the atom - that particular isotope. An element can exist as more than one isotope and the atom's mass number is the (weighted) average of the mass numbers of all its isotopes.
A small difference of mass exist because the gain or loss of electrons.
No, for all elements the smallest particle that can exist independently is an atom.
Almost all of the volume of an atom has no mass.
That is called the nucleus. It is positively charged and it makes up most of the atom's mass.
An atom with atomic number zero and mass number zero does not exist in nature. The atomic number represents the number of protons in the nucleus, and an atom must have at least one proton to be stable.
The mass of an atom is the sum of the masses of protons, neutrons and electrons.
The mass of an atom is concentrated in its nucleus, which is composed of protons and neutrons. The nucleus is extremely small compared to the overall size of the atom, but it contains almost all of the atom's mass. Electrons, which are much smaller in mass, orbit around the nucleus.
The sum of protons and neutrons in an atom is called mass number.
Approximately all of the atom's mass is in the nucleus. The electrons contribute almost zero.No atom has more than 100 electrons, but eachproton or neutron in the nucleushas the mass of more than 1,800 electrons.
The nucleus is the part of an atom that contains practically all its mass. In the nucleus, you can find the proton and neutron. The number of electrons, which move about the nucleus, is equal to the number of protons.
Protons and neutrons. Virtually all of the atom's mass.