The current definition amounts to 1/12 the mass of a carbon-12 atom. In the past (prior to 1961) it's had other definitions, sometimes depending on what field of study the author was in (for a while chemistry and physics defined it differently), so if you're dealing with historical data you've got to be careful.
The Atomic Mass of an atom consists of the sum of the masses of the protons, neutrons, and electrons. The unit for atomic mass is the amu, which means atomic mass unit. This should not be confused with the mass number of an isotope, which is the sum of the protons and neutrons in the nucleus of an atom.
The total number of protons and neutrons in the nucleus. Each has a nominal mass of 1. So the mass of hydrogen, with one proton and no neutrons in its nucleus has a mass of 1.
A.m.u. approximately equals the mass of one proton or one hydrogen atom.
One-twelfth the mass of a carbon-12 atom or 1,660538921(73)×10−27 kg.
The weight of atom
Protons and neutrons it contains.
B
a proton
a single proton
No, the atomic mass is the average mass of the atom and the atomic diameter is the average diameter of the atom
The nucleus of an atom consists of protons and neutrons. The number of protons in a particular nucleus is its "atomic number". The total number of protons and neutrons in a particular nucleus is its "mass number".
Atomic Mass represents the mass of atom. We use mass of protons and neutrons.
What do you mean? Atomic mass of an atom is the weighted average mass of all the naturally occurring isotopes of that element, measured in amu (=atomic mass unit). I do not know how do you want to call it, it is just atomic mass, average atomic mass, mass of an atom, atom's mass...
No, the atomic mass number is the number of protons plus the number of neutrons. The atomic mass of an atom is the total mass in a motionless atom.
the mass of an atom is concentrated in a very small central portion of the atom which is called the atomic nucleus. The atomic nucleus is made up of nucleons, of which there are two important fundamental types: electrically positive protons and electrically neutral neutrons. So the Answer for the question is: Neutrons and Protons.
No, the atomic mass consists of protons, but the atomic mass consists of both protons and neutrons.
Proton + Nuetron = Atomic Mass
The atomic mass of an atom is the combined mass of the protons and neutrons in the nucleus.
No, the atomic mass is the average mass of the atom and the atomic diameter is the average diameter of the atom
The nucleus of an atom consists of protons and neutrons. The number of protons in a particular nucleus is its "atomic number". The total number of protons and neutrons in a particular nucleus is its "mass number".
The number of neutrons in an atom can affect the atomic mass of an atom.
Atomic Mass represents the mass of atom. We use mass of protons and neutrons.
The atomic mass of an atom is the mass of 6.011 X 10^23 atoms of that element.
What do you mean? Atomic mass of an atom is the weighted average mass of all the naturally occurring isotopes of that element, measured in amu (=atomic mass unit). I do not know how do you want to call it, it is just atomic mass, average atomic mass, mass of an atom, atom's mass...
No, the atomic mass number is the number of protons plus the number of neutrons. The atomic mass of an atom is the total mass in a motionless atom.
Atomic mass is the mass of an atom in atomic mass units, and includes protons, neutrons, and electrons; and atomic number is the number of protons in the nucleus of the atom.