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mass number of dysprosium = 66 + number of neutrons in a specified isotope

The mass number is different for each isotope.

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What is the mass number for Dy?

Dy is dysprosium, and the mass number is 162.50 amu


What is the mass number of Dy?

166


Is the atomic weight a whole number?

No, it is not.The atomic mass for an isotope of an element is usually close to a whole number but never exactly so. This is because most elements exist in a number of isotopic forms: they are made up of the same number of protons and electrons but differ in the number of neutrons. So the mass of each isotope of the same element will differ from other isotopes by a whole number of mass units. The atomic mass of the element is the average mass of all its isotopes, weighted together in proportion of the abundance of the elements.The worst offender is dysprosium. The element has 66 proton and electrons 162.5.164-Dy has a mass of 163.929 and accounts for 28.3% of the Dy on earth,162-Dy has a mass of 161.927 and accounts for 25.5% of the Dy on earth,163-Dy has a mass of 162.929 and accounts for 24.9% of the Dy on earth,and there are 4 more isotopes accounting for smaller proportions. When averaged, the atomic mass for Dy is 162.5 - as far from a whole number as you can get!


What is a mass number for Dy?

The mass number of Dysprosium (Dy) is typically 162, as it is the most stable and abundant isotope. However, Dysprosium has several isotopes, with mass numbers ranging from 156 to 167. The mass number represents the total number of protons and neutrons in an atom's nucleus.


What are the chemistry equivalents of a mole?

In chemistry, the equivalents of a mole are the Avogadro's number, which is 6.022 x 1023, and the molar mass, which is the mass of one mole of a substance in grams.


What is the mass number of a atom?

the mass number is number of protons in an atom, plus the number of neutrons.


What is the mass number of molybdenum on the periodic table?

95.94 according to my chemistry textbook...


What does the Mass number in chemistry represent?

The mass number in chemistry represents the total number of protons and neutrons in an atom's nucleus. It is used to identify isotopes of an element, where different isotopes have the same number of protons but a different number of neutrons.


What is the symbol and atomic number for the element Dysprosium?

The symbol for Dysprosium is Dy, and its atomic number is 66.


What is the definition of mass numver is chemistry?

Mass number in chemistry is the number of nucleons in the nucleus. Nucleon is the common name for proton and neutron. In case of Sodium atom the mass number is 23. If it gets changed by adding one more neutron then it is an isotope which is used in medical field as a radio isotope to study about the blood flow.


What are a and z in chemistry?

A is mass number of the element (also the number of protons and neutrons) and Z is the atomic number of the element (also the number of protons)


What is the name of a atomic number of 49 and a mass number of 115?

That element is Indium (In) and it's not a commonly encountered element in chemistry.