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Answered 2010-08-27 13:34:17

Atomic Mass is the average masses of all the isotopes known for that element as they occur in earth's nature.

Atomic number is the element's identity, the number of protons the nucleus has, will never change.

Mass number is [NOT just another way to say atomic mass.]

Added:

Mass number is equal to the number of protons AND neutrons, that is of ONE particular isotope of an element. This is a round figure, not an average like atomic mass.

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Compare atomic number mass number and atomic mass?

Atomic number is the number of protons in the nucleus of an atom.Mass number is the number of protons plus neutrons in the nucleus of an atom of a specific isotope.Atomic mass is the total mass of a an atom of a particular isotope, not just the mass of the nucleus. Atomic mass is usually measured in atomic mass units (amu), and is the total mass of protons, neutrons, and electrons in an individual atom of the isotope.


What does atomic mass number tell us?

Type your answer here..The Atomic Mass Unit tells us that ,How heavy a substance as compare to the other.


Difference between atomic number and atomic mass?

atomic number is a number atomic mass is a mass


What is the difference between the atomic mass and atomic number of an elements?

Atomic number = Number of protons Atomic mass = Mass of protons + mass of neutrons


What is the atomic number and atomic mass number of chlorine?

Atomic Number is 17 - atomic mass is 35.5


What is the atomic mass number of 28.09?

Silicone has that atomic mass. Atomic mass number is 28.


What is the difference between mass number atomic mass and atomic number?

We can find atomic mass and mass number in chemical elements. Atomic mass is about weight of the atom. Mass number is about total of neutrons and protons.


Are the number of neutrons equal to the atomic number minus the atomic mass?

No. Number of neutrons = Atomic mass - Atomic number


The number or protons plus the number of neutrons equal?

Atomic Mass (Atomic weight) Atomic Mass (Atomic weight) or mass number.


What is the atomic mass number of an isotope that has a atomic number of 6 but atomic mass of 5?

The mass can't be less than the atomic number.


What do you do with an atomic number and an atomic mass?

The atomic number is the number of a chemical element in the periodic table of Mendeleev; the atomic number is equal to the number of protons and electrons. The atomic mass is the mass of an atom expressed in relative atomic mass units.


How does the atomic number compare with the atomic weight?

atomic number is the amount of protons. atomic weight is the mean atomic mass measured by the quantity of protons and neutrons taking into account all isotopes and their relative abundances.


Can you use the atomic number and atomic mass to calculate the number of each subatomic particle?

atomic number = number of protons = number of electrons atomic mass = mass of protons + mass of neutrons


How do you calculate the number of neutrons if you are given the atomic mass and the atomic number?

relative atomic mass- atomic number


What is the atomic number and atomic mass number for aluminum?

The atomic number for Al is 13 and the atomic mass is 26.98.


The atomic number and atomic mass for magnesium?

Atomic number = 12 Atomic mass = 24


What is the atomic mass and the atomic number of potassium?

Atomic number is 19, atomic mass is 39.


What is atomic mass and atomic number for radium?

The atomic number is 88 and the atomic mass is 226


What is the atomic mass number for H2O?

Atomic mass number for H is 2, Atomic mass number for O is 16.


Is it true that The atomic mass is equal to the atomic number?

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.


What is atomic mass or mass number?

Atomic mass is the mass of protons + mass of neutrons Mass number is the number of protons + number of neutrons


What is the atomic mass number equal to?

Atomic mass NUMBER = number of protons + number of neutrons. This is not to be confused with atomic mass which is the total mass of a motionless atom.


What is the relationship btw atomic mass and atomic mass number?

We can find atomic mass and mass number in chemical elements. Atomic mass is about weight of the atom. Mass number is about total of neutrons and protons.


What is the difference between the atomic number and the atomic mass?

Atomic mass is the mass of 1 mole of the element. Atomic number is the number of protons the element has


How do you use the atomic number and the atomic mass to calculate the number of neutrons?

atomic mass minus atomic number = number of neutrons