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The atomic number is the number of protons or electrons in an atom (there are the same amount of protons and electrons in an atom unless it's positively or negatively charged). The atomic weight is the average weight of the protons or electrons plus the neutrons of all the different isotopes of the atom. That's one of the reasons why the atomic weight of each element on the table of elements is not an integer.
If you multiply the atomic number by two, you'll have a fair estimate of the atomic weight for the top part of the periodic table. For the heavier elements, this will come up a little bit light.
What else can I help you with?
What is the approximate mass of Fe?
The atomic weight of iron is 55,845.
Is the atomic weight the same as the atomic number?
No, the atomic number is the number of protons that an atom contains. Atomic weight is the number of protons and neutrons.
How was is the atomic number and the atomic weight of uranium found?
Atomic number of uranium: 92 Atomic weight of uranium: 238,02891
Atomic weight and atomic number of copper?
Its atomic number is 29 and its standard atomic weight is 63.5 g/mol.
What can we predict from an elements location on the periodic table?
You can predict it's physical state, atomic size, atomic weight, electron effinity, charge, and other physical characteristics.
What is the number of neutrons in an atomic number?
Subtract the atomic number from the atomic weight.
What is the number in front a chemical formula is called?
atomic number or atomic weight. Subscript: atomic number, superscript: atomic weight: 94Pu239 or 239Pu
What is carbons atomic weight?
Atomic Number = 6. Atomic Weight = 12.011
Is the atomic number of an atom the number of neutrons?
Subtract the atomic number from the atomic weight.
Is atomic number the number of protons and neutrons?
No, the atomic number is the same number of protons and electrons. To find the neutrons, you subtract the atomic weight by the atomic number. Make sure to round the atomic weight as well.
What is the atomic number for carbon?
The atomic number is: 6. The atomic weight is 12.011
What is the number on the periodic table?
The large number on the periodic table is the atomic number. There is a smaller number that is the atomic weight. For example, Titanium's atomic number is 22 and its atomic weight is 47.867.
