The Atomic Mass number of an element is the sum of the protons and neutrons in the nucleus of an atom of that element.
The relative Atomic Mass is the average atomic mass number of all the known isotopes of an element.
protons plus the neutrons plus the electrons
the mass number of an atom is found by adding the_(c)_.
a)neutrons and atoms
b)protons and electrons
c)protons and neutrons
d)electrons and isotopes
the number of neutrons. (the number of protons plus the number neutrons is the atomic mass)
The mass number is the sum of protons and neutrons in the atomic nucleus. The number of protons is equal to the atomic number.
Atomic mass is the number of protons and neutrons in an atom.
when you could check in most of atoms that we have you will see that the sum of protons and electrons equals to or is called the atomic weight or atomic mass...that is if you add protons to electrons you have your atomic mass.
The sum of the number of protons and the number of nuetrons.
It looks like you have combined two concepts. The number of protons in an atom is the atomic number. The sum of the protons and the neutrons in an atom is the mass number. There is no such thing as an atomic mass number.
protons + electrons= atomic mass NUMBER, not the atomic mass.
The atomic number is equal to either the number of electrons or the protons of a particular atom. The atomic mass in a.m.u. is equal to the sum of protons and neutrons in an atom.
The mass number is the sum of protons and neutrons in the atomic nucleus. The number of protons is equal to the atomic number.
Atomic mass is the number of protons and neutrons in an atom.
when you could check in most of atoms that we have you will see that the sum of protons and electrons equals to or is called the atomic weight or atomic mass...that is if you add protons to electrons you have your atomic mass.
The mass number of an isotope of an element is equal to its atomic mass number. However, the atomic weight of an element is a weighted average of the isotopes that occur in the element in nature. Because almost all elements have more than one naturally occurring isotope (if they have any), the atomic weights of most elements are not integers, as mass numbers always are.
1. The molecular mass of a compound is the sum oh the atomic weights of the elements contained in the molecule of this compound. 2. The atomic number of an element is the number of this element in the Periodic Table of Mendeleev; the atomic number is equal to number of protons and electrons.
The sum of the number of protons and the number of nuetrons.
This is sum of the atomic weights of elements contained in the formula.
The mass number of an atom is equal to the sum of its number of protons and neutrons, simply, nucleons.
The mass number of an atom is equal to the sum of its number of protons and neutrons, simply, nucleons.
It looks like you have combined two concepts. The number of protons in an atom is the atomic number. The sum of the protons and the neutrons in an atom is the mass number. There is no such thing as an atomic mass number.