No, it isn't. It is the atomic weight that is a weighted average of the mass of each of the naturally occurring isotopes of an element. The mass number, or A, is the number of protons and neutrons (the so-called nucleons) in the nucleus of an atom of an element. The atomic number, or Z, is the number of protons in the nucleus of an element.
Atomic unit mass (symbol u): 1/12 of the mass of an atom of carbon 12 in ground state and at rest (IUPAC definition).
Sometimes used synonym: Dalton (Da)
1 u = 1, 660 538 782.10-24 g
No. Gallium is an element. The element Gallium has two naturally occuring stable isotopes (69Ga and 71Ga) and abpout 29 unstable isotopes.
Aluminium is an element, it is not synthetic.
isotopesHelium-4 and helium 3 are isotopes and each have 2 protons. Helium 3 only has 1 neutron, while helium 4 has 2 neutrons.
Uranium is the heaviest naturally occurring actinide.
Radioactive Elements (38) These elements are radioactive. They either have no stable naturally occurring isotope, or else are entirely artificial (all artificial elements have no stable isotopes). by Andrew Moore
The average of all the naturally occurring isotopes of a particular element are an element's atomic Mass.
The known weighted-averagemass of all the naturally occurring* isotopes for an element is the atomic mass of the element.____________________*This is not the same as "all the known isotopes", becausemost elements have known isotopes that are not naturally occurring.
The known weighted-averagemass of all the naturally occurring* isotopes for an element is the atomic mass of the element.____________________*This is not the same as "all the known isotopes", becausemost elements have known isotopes that are not naturally occurring.
The known weighted-averagemass of all the naturally occurring* isotopes for an element is the atomic mass of the element.____________________*This is not the same as "all the known isotopes", becausemost elements have known isotopes that are not naturally occurring.
Yes they do.
The mean Atomic Mass.
The atomic weight that is listed on the periodic table for each element is the weighted average of the atomic masses of an element's naturally occurring isotopes. So you are describing atomic weight as it is used on the periodic table.
The atomic weight of the element (syn.: mass number).
For the chemical elements the correct expression is atomic weight.This value is the weighted average mass of the natural isotopes of this element.
The radon isotopes 222Rn and 220Rn are natural isotopes.
No. Gallium is an element. The element Gallium has two naturally occuring stable isotopes (69Ga and 71Ga) and abpout 29 unstable isotopes.
Tin is an element with ten naturally occurring isotopes.