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For elements with no stable isotopes (like Nobelium), the mass number of the isotope with the longest half-life is used. Mass numbers are whole numbers.
Wiki User
∙ 8y ago
Wiki User
∙ 12y agoAfter IUPAC tables (2oo9) the atomic weight of nobelium is [259].
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What is the atomic mass of nobelium?
After IUPAC tables (2oo9) the atomic weight of nobelium is [259].
Why is the atomic mass of nobelium written as a whole number in parentheses instead of a decimal?
259 is the mass number of the isotope with the longest half life. This system is a convention from IUPAC for elements having very unstable and artificial isotopes.
What is the nearest whole number of atomic mass of potassium?
The nearest Whole number of atomic mass of potassium is 69
Why the relative atomic mass is not a whole number?
Bexause its similar with the atomic mass
What is an element's atomic mass not listed as a whole number on the periodic table?
Few elements have isotopes. their atomic mass is not a whole number.
How many neutrons does nobelium have?
157; you figure that out by taking the atomic mass (259) and subtract it by the # of protons (102) and the answer is the # of neutrons. ( the atomic #, # of protons, and # of electrons are always the same # 102 ). But each isotope of nobelium has a different number of neutrons, depending on the atomic mass.
What is the atomic mass of nobelium?
After IUPAC tables (2oo9) the atomic weight of nobelium is [259].
What is nobelium's atomic mass?
After IUPAC tables (2oo9) the atomic weight of nobelium is [259].
Why is the atomic mass of nobelium written as a whole number in parentheses instead of a decimal?
259 is the mass number of the isotope with the longest half life. This system is a convention from IUPAC for elements having very unstable and artificial isotopes.
Why atomic mass is always a whole number but atomic weight may be a decimal number?
Atomic mass of isotopes is not a whole number.
What is the nearest whole number of atomic mass of potassium?
The nearest Whole number of atomic mass of potassium is 69
Why is the atomic mass number not a whole number?
We can find Atomic Mass and mass number in chemical elements. Atomic mass is about weight of the atom. Mass number is about total of neutrons and protons.
Is the atomic mass of an element is always a whole number of atomic mass untis?
No.
Why the relative atomic mass is not a whole number?
Bexause its similar with the atomic mass
What is an element's atomic mass not listed as a whole number on the periodic table?
Few elements have isotopes. their atomic mass is not a whole number.
Is 40.08 the atomic number?
No. Atomic number is always a whole number. This would be the atomic mass.
How do you find the atomic mass and the atomic number?
The atomic number is the whole # on the periodic table or the # of protons in an atom. The atomic mass is the # that is not the whole # on the periodic table, or you can multiply the mass of the isotope by its abundance and add the answers together.
