You need to know the atomic # or the masses of each isotope of the element.
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.
Thalium is a meta element. Atomic mass of it is 204. Atomic number of it is 81.
The masses and relative abundances of all naturally occurring isotopes of the element are required to calculate average atomic mass of the element.
Number of protons
The atomic mass listed on most periodic tables is actually the average atomic mass representing the average atomic masses of the various isotopes of an element depending on their percent natural abundance. Refer to the answers.com question: What is the formula for finding average atomic mass? for a detailed explanation on how to calculate this value. (What_is_the_formula_for_finding_average_atomic_mass)
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.
To calculate the atomic mass of an element, add up the mass of protons and nuetrons.
Thalium is a meta element. Atomic mass of it is 204. Atomic number of it is 81.
them mass number of an element is the total amount of nuetrons and protons in the element , and the atomic number is the amount of protons ( and electrons) in the element simply subtract the atomic number from the mass number and you'll have the number of neutrons in the element hope this helped x
The masses and relative abundances of all naturally occurring isotopes of the element are required to calculate average atomic mass of the element.
the atomic number of each isotope-apex;)
Number of neutrons = Atomic mass - Atomic number
For any element, subtract the atomic mass from the atomic number.
Number of protons
By taking the wieghted averages of naturally occurring isotopes of that element. :)
The atomic mass listed on most periodic tables is actually the average atomic mass representing the average atomic masses of the various isotopes of an element depending on their percent natural abundance. Refer to the answers.com question: What is the formula for finding average atomic mass? for a detailed explanation on how to calculate this value. (What_is_the_formula_for_finding_average_atomic_mass)
First, find its atomic mass on the periodic table and subtract the number of protons (element number) from it and there you go