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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.
Wiki User
∙ 12y ago
The mass of an element is determined by the total number of protons and neutrons in its nucleus. This mass is typically measured in Atomic Mass units (amu) and is an average of all the naturally occurring isotopes of that element.
Wiki User
∙ 14y agoMass of an element is the sum of Number of protons and Number of neutrons.
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Which element has a greater atomic mass A or B?
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.
What is the mass number of the element Na?
Sodium is a metal element. Mass number of it is 23.
What does the atoimc mass of an element represent?
The atomic mass of an element represents the average mass of an atom of that element, taking into account the abundance of different isotopes of the element. It is measured in atomic mass units (amu) and is listed on the periodic table below the element's symbol.
How would we know how many moles are in a certain element?
number of moles = mass of the element/molar mass of the element
Which best describes the definition for the atomic mass of an element?
The atomic mass of an element is the average mass of an element's isotopes, weighted by their natural abundance. It is expressed in atomic mass units (u) and is often close to the mass number of the most abundant isotope of the element.
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 molar mass of an element is equal to the atomic mass of that element expressed in grams per mole. It represents the mass of one mole of atoms of that element.
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)
What is the atomic mass for magnesiam?
The atomic mass of magnesium is approximately 24.305 amu (atomic mass units).
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 of this element?
Gold is a meta element. Atomic Mass of it is 197.
What 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
Which element has the atomic mass of 126.9045?
The element is Iodine (I). It has an atomic mass of about 126.9.
What is the average mass of the isotope of an element?
the average mass numbers of the isotopes of an element
