0
The atomic number (the mass) of an element is determined by finding the masses of the isotopes of that element, adding them all together, and dividing by the number of isotopes. (The Atomic number is the average of all the masses.)
Wiki User
∙ 12y ago
Wiki User
∙ 9y agoThe mass number of an element is determined by the number of protons and neutrons present in the most abundant form of its atoms. For example, carbon has an atomic number of 6, so it has 6 protons. The most abundant form of carbon has an atomic weight of 12, therefore carbon atoms must have 6 neutrons and 6 protons. The Atomic Mass can be found from the difference between atomic weight and atomic number.
Wiki User
∙ 14y agoThe average mass number of an element is determined by taking into account the masses of all isotopes of an element and the abundance of each of these isotopes. Average atomic mass is determined by multiplying the mass of an isotope by the decimal of its percentage abundance, and adding all of the weighted masses together. Davey. Redtailthearrow@Yahoo.com
Wiki User
∙ 8y agothe mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.
Wiki User
∙ 11y agoThe term mass is used only for isotopes; for elements the term weight is used.
For the determination of the atomic weight we need to know:
- the exact isotopic composition of the element
- the exact atomic masses of these isotopes
Add your answer:
Earn +20 pts
The molar mass of an element is equal to?
The element's average atomic mass.
What is the weighted average mass of all the know isotopes for an element?
It is its Atomic Mass and why atomic mass is frequently not a whole number.
What is the average mass of the atoms element?
The average atomic weight (not mass for elements) of a chemical element is calculated taking into account the isotopic composition of this element and the atomic masses (not weight for isotopes) of these isotopes.
Which is the average of the mass numbers of an element's isotopes?
the Atomic Mass
What element has mass number 52?
Chromium is a metallic element. Mass number of it is 52.
What is the difference between average atomic mass and atomic mass?
Which is the average of the mass number of an element isotpes?
The atomic weight or atomic mass.
How is the mass number of an isotope different from the average atomic mass that is on the periodic table?
The mass number for a particular isotope of an element is a precise value. The average atomic mass for an element is the value you would measure for that element given all the isotopes it has and their abundance in the sample.
What would cause the average atomic mass to be close to a whole number?
The average atomic mass of an element would be closer to a whole number if there were few to no electrons. This means having little to no electrons in the element's isotopes.
What does a mass number determine?
mass number = number of protons + number of neutrons DIFFERENT FROM ATOMIC MASS atomic mass = weighted average of all the isotopes of that element
What is a mass number atomic mass number?
The atomic number is the number of protons in an atom. This number is fixed and determines what element that atom is. The Atomic Mass is the mass of an atom and is roughly equivalent to the number of protons plus the average number of neutrons that atoms of that particular element.
The molar mass of an element is equal to?
The element's average atomic mass.
Why is the atomtic mass of element an average mass?
The atomic mass of an element is the average of all the isotopes of that element that exist on this earth, either naturally or artificially. An isotope is an atom that differs in the number of neutrons that it would normally have (which is usually the same as the number of protons it has, except in the case of hydrogen).
What is atomic mass of a element?
the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.
What does the mass of an element represent?
the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.
What is the average mass of the isotope of an element?
the average mass numbers of the isotopes of an element
Does the mass number of an element have to be a whole number?
Approximately, yes. But the mass number is an average of the masses of the isotopes of the element, weighted together according to their abundance. This averaging of different whole numbers results in the mass number not being a whole number.
