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Atomic masses are the weighted average of all the isotopes of an element. The average is based on the relative abundance of each isotope. Let say we have an element with two isotopes, the first isotope has a mass of 6 and the second has a mass of 8. If we took a straight average of the atomic masses then the element would have a mass of 7. But a weighted average based on the abundance of each isotope would be different (unless both isotopes are found to be in equal amounts ie. both 50% abundance)
If the isotope with a mass of 6 had a relative abundance of 75% (meaning that 3/4 of all atoms of that element had a mass of 6) then the other isotope would have a relative abundance of 25% (relative abundance must add up to 100%). The Atomic Mass of the elements would be calculated by multiplying each isotopes mass my the relative abundance and then adding the two results together.
75% (6) = 4.5
25% (8) = 2.0
4.5 + 2.0 = 6.5 The atomic mass for this element would have an atomic mass of 6.5 amu (atomic mass units)
What else can I help you with?
What atoms with same atomic number but different atomic masses?
Isotopes are atoms with the same number of protons (same atomic number) but different numbers of neutrons, leading to different atomic masses. For example, carbon-12 and carbon-14 are isotopes of carbon with atomic number 6 but atomic masses of 12 and 14 respectively.
What are atoms of the same element but with different masses?
Atoms of the same element that have different masses are called isotopes of the element. The presence of different numbers of neutrons in the nucleus is responsible for the existence of isotopes of an element.
Why aren't the atomic masses of most elements whole numbers?
The atomic masses of most elements are not whole numbers because they take into account the average mass of all the isotopes of that element, which have different masses due to varying numbers of neutrons. This results in a weighted average that is not a whole number.
Are the Isotopes are atoms of the same element with the same number of protons and?
The isotopes of an element have the same number of protons, but different numbers of neutrons.
The various atomic weights of the same element are called?
Atoms of the same element with different atomic masses are known as isotopes. Isotopes differ only by the number of neutrons present in the nucleus of the isotopes. The number of protons is the same for all isotopes of an element (because if there were different numbers of protons, then the atoms would not be of the same element).
Which term describes atoms with different atomic masses due to varying numbers of neutrons?
Isotopes describe atoms with different atomic masses due to varying numbers of neutrons.
Which statement best explains why most atomic masses on the periodric table are decimal numbers?
Most atomic masses on the periodic table are decimal numbers because they are weighted averages of the masses of all isotopes of an element, taking into account their relative abundance. Since isotopes have different masses, the atomic mass is typically not a whole number.
What atoms with same atomic number but different atomic masses?
Isotopes are atoms with the same number of protons (same atomic number) but different numbers of neutrons, leading to different atomic masses. For example, carbon-12 and carbon-14 are isotopes of carbon with atomic number 6 but atomic masses of 12 and 14 respectively.
What does it mean if two atoms are isotopes?
If two atoms are isotopes, it means they have the same number of protons but different numbers of neutrons. Thus, they have the same atomic numbers, but different atomic masses.
What cause different isotopes to have different atomic masses?
Different numbers of neutrons in their nuclei.
What atoms has different masses but the same atomic number?
Isotopes of an element have different masses but the same atomic number. Isotopes have the same number of protons and electrons but different numbers of neutrons in their nuclei.
What are atoms of the same element thay have different atomic masses?
Atoms of the same element that have different atomic masses are called isotopes. Isotopes of an element have the same number of protons but different numbers of neutrons. This results in variations in atomic mass while maintaining the same chemical properties.
Who find that atoms with same atomic number but different atomic mass?
Isotopes are atoms with the same number of protons (atomic number) but different numbers of neutrons, resulting in different atomic masses. These isotopes have similar chemical properties but may have different physical properties due to their different masses.
What are atoms of the same element but with different masses?
Atoms of the same element that have different masses are called isotopes of the element. The presence of different numbers of neutrons in the nucleus is responsible for the existence of isotopes of an element.
Why aren't the atomic masses of most elements whole numbers?
The atomic masses of most elements are not whole numbers because they take into account the average mass of all the isotopes of that element, which have different masses due to varying numbers of neutrons. This results in a weighted average that is not a whole number.
How are isotopes different than naturally occurring elements?
Isotopes are atoms of the same element with different numbers of neutrons, while naturally occurring elements refer to all atoms of a particular element found in nature. Isotopes have the same number of protons but different atomic masses, whereas naturally occurring elements have consistent atomic masses based on the average of all isotopes present.
Different isotopes have different what?
The isotopes of an element must have a different amount of neutrons. I'm pretty sure you know what these are, but just in case: A neutron is a sub-atomic part of an atom, together with protons and electrons.
