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The atomic weight (not mass) of a chemical element is the ratio between the average mass of the atoms of this element to 1/12 from the Atomic Mass of carbon-12.
The atomic mass is a term applied only to specific isotopes; the unit is the same as above.
The mass number tells us the number (the sum) of protons and neutrons in the nucleus of an atom.
The atomic number, on the other hand, tells us how many protons are in the nucleus of an atom.
IUPAC publish periodically tables of atomic weights - the last edition is from 2009-2010.
For the atomic masses of isotopes the last published edition is The AME 2003 atomic mass evaluation, edited by Audi, Wapstra and Thibault.
What else can I help you with?
What does atomic mass number tell us?
The atomic mass number tells us the total number of protons and neutrons in an atom's nucleus. It is used to determine the mass of an atom and is necessary for calculating the atomic weight of an element.
What information does the periodic chart tell you?
Symbol Name Atomic Number Atomic Mass
How do you tell figure out the atomic mass?
Atomic mass is the number of protons + the number of neutrons in the nucleus of an atom. On the periodic table, the average atomic mass of an element will the be number at the bottom of each box.
What does an element's mass number tell us?
An element's mass number tells us the total number of protons and neutrons in its nucleus. It helps to determine the element's atomic mass and differentiate it from other isotopes of the same element.
What is the atomic mass of an atom with 5 electrons?
you can't tell the atomic mass of an atom if either the number of protons or neutrons is missing. But Boron with 5 protons and 6 neutrons has and atomic mass of 11.
What does an element's atomic mass tell us about the atoms that make up that element?
atomic mass is the no. of protons+no. of nuetron
What does atomic mass number tell us?
The atomic mass number tells us the total number of protons and neutrons in an atom's nucleus. It is used to determine the mass of an atom and is necessary for calculating the atomic weight of an element.
What are the orientation of elements in the peridoc table tell us the arrangement of the what?
The periodic table is in order of atomic mass
What does the atomic mass tell us?
it tells us that the number is equal to the number of protons plus the number of nuetrons in the nucleus of an atom
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 does an element's atomic mass tell about the atoms that make up that element?
Atomic Mass is the no. of protons+no. of nuetron
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 do the atomic and mass number of an atom tell us?
The atomic weight (not mass) of a chemical element is the ratio between the average mass of the atoms of this element to 1/12 from the atomic mass of carbon-12.The atomic mass is a term applied only to specific isotopes; the unit is the same as above. Is a value denoting the total mass of all the protons, neutrons, and electrons in an isotope.The mass number is the sum of nucleons (protons and neutrons) in the atomic nucleus.
What does the relative atomic mass of an element tell us about the relative abundance of an isotope?
None. The relative abundance of isotopes is used to calculate the Average Mass (by multiplying the Atomic Mass of the isotopes by their relative abundancies and adding the products together) while the Atomic Mass is simply the number of protons plus the number of neutrons.
What information does the periodic chart tell you?
Symbol Name Atomic Number Atomic Mass
