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The atomic weight (not mass !) of an element is the weighted average mass of the naturally occurring isotopes.Example: the atomic weight of chlorine is 35.45. Chlorine is naturally composed of chlorine-35 at 75.76% and the rest chlorine-37. Therefore, the mass of any sample must be due to (75.76 x 35 + 24.14 x 37)/100
The mass number of an element is the number of protons and neutrons of that isotope added together. In the above example there were two isotopes, one had a mass number of 35 and the other 37. Chlorine has 17 protons, so it is easy arithmetic to calculate the number of neutrons in each isotope.
Wiki User
∙ 12y ago
Wiki User
∙ 8y agothe mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.
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What number tells the mass of the nucleus of an atom?
The atomic mass number is the mass of the nucleus in atomic mass units.
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.
What information does atomic mass give you?
Atomic mass is the average mass of all isotopes of a given element.
What the atomic mass tell the total number of?
The Atomic Mass of an element tells you what the mass of one mole (6.022 x 1023 atoms) of the element is. It sort of tells you the number of protons & neutrons in the atom, but that is not necessarily precise.
How are atomic number and atomic mass related to atomic structure?
The atomic number tells how many protons are in the atom, and the atomic mass tells how many neutrons and protons are in the atom together. Like Oxygen has an atomic number of 8. It also has 8 protons. It's atomic mass is 16. It also has 16 neutrons and protons. Helium's atomic number is 1. It only has 1 proton. It's atomic mass is 1 because it doesn't have any neutrons.
What number tells the mass of the nucleus of an atom?
The atomic mass number is the mass of the nucleus in atomic mass units.
What is the atomic mass number?
The atomic mass number tells how many protons and neutrons are in a nucleus.
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.
What do the atomic number and atomic mass tell you about an atom?
Atomic number tells the number of protons and electrons, but i don't remember for atomic mass.
What does the atomic mass tell you about the atom?
The Atomic Mass of an element tells you the average mass of an atom in the element.
What do the atomic number and mass number tell about an atom?
Atomic number tells the number of protons and electrons, but i don't remember for Atomic Mass.
What do the atomic number and mass number tell you about an atom?
Atomic number tells the number of protons and electrons, but i don't remember for Atomic Mass.
What determines the atomicity of the elements?
The Atomic Mass number tells the atomic mass of an element. The mass is calculated as the mass of all the protons and neutrons in the center of an atom.
Tells you the number of atoms in each element?
atomic mass is the answer
What is the number called that tells how heavy an element is?
atomic mass
What information does atomic mass give you?
Atomic mass is the average mass of all isotopes of a given element.
What the atomic mass tell the total number of?
The Atomic Mass of an element tells you what the mass of one mole (6.022 x 1023 atoms) of the element is. It sort of tells you the number of protons & neutrons in the atom, but that is not necessarily precise.
