IUPAC proposed the atomic weight (243).
The atomic mass of the isotope americium-242 is 242,059 549 2.
The average atomic mass of an element is the average of the atomic masses of its isotopes (that is a weighted average). You have to take into account the abundance of each isotope when they do your averaging.
The two main factors in determining the average atomic mass of an element are:the isotopic composition of the element (the fraction of each isotope)the atomic mass of each isotope
Average atomic mass is the weighted average mass of all the isotopes of an element, taking into account their natural abundances. Atomic mass refers to the mass of a single atom of a specific isotope of an element.
average atomic massof an element=(Atomic mass of first isotope X % of that isotope) + (Atomic mass of second isotope X % of the second isotope)
Mass number = Number of protons + Number of neutrons For the isotope 241Am the mass number is 241; for 242Am is 242, for 243Am is 243, etc. Americium has isotopes with mass numbers that range from 231 through 249.
Silver is a meta element. Atomic mass of it is 108.
Carbon has an average atomic mass of about 12.
Atomic mass refers to the mass of a single atom of an element, while average atomic mass is the weighted average of the masses of all the isotopes of an element, taking into account their relative abundance in nature.
The average atomic mass is a weighted average of the masses of all isotopes of an element, taking into account their abundance. The atomic mass listed on the periodic table is the weighted average of all naturally occurring isotopes of the element. So, they are essentially the same thing, with the average atomic mass being a more specific term.
Element A has a greater atomic mass than element B if the atomic mass value of A is higher. The atomic mass represents the average mass of an element’s isotopes based on their abundance in nature.
The Atomic Mass of an element tells you the average mass of an atom in the element.