Thalium is a metal element. Atomic mass of it is 204.
To calculate the atomic mass of any element, add the no. of protons and neutrons. There sum will be the atomic mass. The mass of electrons is not counted towards the atomic mass.
The same way you calculate the atomic mass of other elements.
relative atomic mass- atomic number
Lead is a metal element. Atomic mass of it is 207.2.
The atomic mass of Mg is 24.3 amu.
The molar mass (not atomic mass) of sodium chloride is 58,44 g.
Thalium is a metal element. Mass number of it is 204.
To calculate the atomic mass of an element, add up the mass of protons and nuetrons.
atomic mass minus atomic number = number of neutrons
- take your average mass and round it, then take your atomic number and subtract it by your average mass. This will give you you atomic mass of an element. -
You add the number of protons and neutrons in an atom, and the total is the atomic mass.
Gold is a meta element. Atomic mass of it is 197.
the atomic mass number is the number of protons/electrons in an atom
Oxygen is a non meta element. Atomic mass of it is 16.
81 protons, as the atomic number of thallium is 81
The atomic mass of isotopes is determined by mass spectrometry.
atomic # = protons atomic mass - atomic number = neutrons atomic # - charge = electrons
atomic number = number of protons = number of electrons atomic mass = mass of protons + mass of neutrons
The atomic weight (not mass) of sodium is calculated after the determination of the atomic masses of each natural sodium isotopes by mass spectrometry.
we can calculate the number of neutrons by deducting atomic number from atomic mass.
Its atomic number is 81. So there are 81 protons.
the atomic number minuse mass number
Average atomic mass = (fraction1 x atomic mass1) + (fraction2 x atomic mass2) + (fraction3 x atomic mass3) ...