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The mass number of an element is the atomic mass rounded to the nearest whole number. For Example, if the atomic mass is 54.94 (Manganese [Mn]), then the mass number will be 55. You can use the mass number to calculate the amount of neutrons in an isotope.

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Related Questions

What determines an element's mass?

the mass of protons + the mass of neutrons = mass of the element


What do you call the mass of an element?

The mass of an element is known as it's ATOMIC Mass.


What is the mass percent composition of an element in a molecule?

Percentage composition= (mass of the element/mass of the molecule)*100 The fraction of the molecule's mass that comes from the element's mass


The molar mass of an element is equal to?

The element's average atomic mass.


How to find the mass of an element in a chemical compound?

To find the mass of an element in a chemical compound, you can use the atomic mass of the element from the periodic table and the number of atoms of that element in the compound. Multiply the atomic mass by the number of atoms, and you will get the mass of that element in the compound.


What element has a mass number of 85?

Rubidium is a metal element. Mass number of it is 85.


What is this element atomic mass?

mass of protons + mass of neutrons present in the element (as the mass of electrons is practically negligible)


How to find the mass of an element in a compound?

To find the mass of an element in a compound, you can use the formula: mass of element (mass of compound) x (percent composition of element in compound). This formula helps you calculate the mass of a specific element within a compound based on its percentage composition.


What is the mass of this element?

Gold is a meta element. Atomic Mass of it is 197.


How do you calculate the percent by mass of an element in a compound?

To calculate the percent by mass of an element in a compound, you divide the mass of the element by the total mass of the compound and then multiply by 100. This gives you the percentage of the compound's mass that is made up of that specific element.


How is molar mass of an element determined?

the Atomic Mass in g/ml is the molar mass of the element


What is the mass number of the element Na?

Sodium is a metal element. Mass number of it is 23.