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The atomic number is the total number of protons in the nucleus of an Atom and for any particular Atom this number is invariable. The mass number is the total weight of both protons and neutrons in the nucleus. Isotopes exist because the number of neutrons contained within the nucleus of 'any given Atom' varies. Hence carbon dating and also isotope dating of many sorts are made possible.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoThe mass number (A), also called atomic mass number (not to be confused with atomic number (Z) which denotes the number of protons in a nucleus) or nucleon number, is the number of protons and neutrons (also defined as a less commonly known term,nucleons) in an atomic nucleus.
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Wiki User
∙ 12y agoAtomic number is the number of protons in the nuclei of the atoms of that element. It is the same for all isotopes of a given element. Mass number refers to the sum of the protons and neutrons in the nuclei of the atoms of the element. Different isotopes have different mass numbers because they have different numbers of neutrons.
Wiki User
∙ 12y agoThe atomic number is the number of protons in an atom. The mass number is the number of protons plus neutrons in an atom.
Wiki User
∙ 11y agoAtomic Mass means the mass of the nucleus of the atom, and atomic number means the number of atoms in it's shells.
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What do the numbers and letters in the periodic table represent?
either mass or protons the top is the atomic number it shows how many protons the bottom number is the atomic mass also the weight
What does the number 24.305 represent for magnesium?
That is the average atomic mass for Mg.
What do the numbers on mendeleev's periodic table represent?
The Atomic number which is the number of protons in an atom's nucleus.
What does the Mass number in chemistry represent?
the atomic mass incdicated the amount of protons and neutrons of the atom
What equals the number of neutrons plus the number of protons in an atom?
The mass number is a whole number that is equal to the sum of protons and neutrons in an atom. Mass number is represented by the letter (A) orA= Z + N (Z) represent the atomic number or the number of protons in the nucleus.
What does the number represent in platinum-195?
It represents the atomic number and atomic mass. Mass number is the superscript Atomic number is the subscript
What symbol do scientists use to represent atomic mass unit?
the symbol scientists use to represent the atomic mass number is the letter U.
What does the atomical number represent?
The Atomic Mass is the mass (weight) of the element measured in atomic mass units (AMU)
What does the decimal number in an element key represent?
atomic mass
What do the numbers and letters in the periodic table represent?
either mass or protons the top is the atomic number it shows how many protons the bottom number is the atomic mass also the weight
What does the number 24.305 represent for magnesium?
That is the average atomic mass for Mg.
If there is a difference between a substance atomic number and its atomic mass which measure must be the larger number?
The atomic mass number must be higher as that represent the number of protons and neutrons in an element. Whereas only the number of protons are represented in the Atomic Number.
If there is a difference between a substance's atomic number and its atomic mass and which measure must be the larger number?
The atomic mass number must be higher as that represent the number of protons and neutrons in an element. Whereas only the number of protons are represented in the Atomic Number.
What do the numbers on mendeleev's periodic table represent?
The Atomic number which is the number of protons in an atom's nucleus.
What does the mass number of an atom represent?
The mass number is the sum of protons and neutrons in the atomic nucleus of a chemical element.
What does Bohrs diagram represent?
it represents where the atoms, protons, Atomic Mass, atomic number, and electrons where they are located on the nucleus.
Which two particles does the atomic mass number represent?
The sum of Protons and neutrons
