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When Atomic Mass is expressed in unified atomic mass units, it is similar to isotopic mass and has the same numerical value as that of atomic mass. The atomic mass or the relative isotopic mass is the mass of one atom which at a time can be only one isotope.
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Why don't the elements on the periodic table have a whole number as their atomic weight?
Elements exist as isotopes in nature. So their atomic weight is not a whole number.
What relationship exist between the mass number of an element and the isotopes of that element?
Each isotope of the same element has a specific mass number, which is the sum of the protons and neutrons in the nucleus.
How the elements of isotopes are alike and how they are different?
Elements can exist in the form of different isotopes. Isotopes of the same element have the same number of protons in their nuclei but have different numbers of neutrons. The first gives them the same atomic number and chemical properties while the second gives them different atomic weights.
Why is there an average atomic mass?
There is an average atomic mass because all atoms of the same element do not have the same amount of neutrons (isotopes), therefore variations in atomic mass exist. The average atomic mass of an element is the estimated average of all the atoms of the same element, given the average of different isotopes in a scientific sample.
How many neutrons does the element Ds have?
Darmstadtium is an artificial element; no stable isotopes exist. From Wikipedia: "Eight different isotopes of darmstadtium have been reported with atomic masses 267, 269-271, 273, 277, 279, and 281, ..." The numbers are protons + neutrons. Subtract 110 (the atomic number for this element) to subtract the protons, and get the number of neutrons for the different isotopes. In other words, between 157 and 171, depending on the isotope.
Can isotopes exist because atoms can have different numbers of protons?
Isotopes can exist because atoms of the same element can have different numbers of neutrons, leading to variations in atomic mass. This results in isotopes having the same number of protons but different numbers of neutrons, causing differences in stability and reactivity.
How do you know that isotopes exist?
Isotopes are known to exist because they are variants of a particular chemical element with the same number of protons but different numbers of neutrons, resulting in different atomic masses. These variations can be detected through techniques like mass spectrometry and nuclear magnetic resonance. The existence of isotopes has been confirmed through experimental evidence and scientific research.
Do most elements occurs a mixture of two or more isotopes on nature?
For elements the correct term is atomic weight.For isotopes the correct term is atomic mass.The atomic weight is determined considering the isotopic composition of an element and the atomic mass of each isotope.
Are most of the periodic table isotopes?
No most of them are not isotopes. Few elements exist as isotopes.
The atomic mass of iron is 55.847 amu. Why isn't this value a whole number?
because it's an average of various isotopes, in proportion in which they exist in nature
Why can atoms have more than one mass number but only one atomic number?
Atoms can have more than one mass number because they can exist as isotopes, which have the same number of protons (atomic number) but different numbers of neutrons. The atomic number is determined by the number of protons in the nucleus of an atom and defines the element, while the mass number is the total number of protons and neutrons in the nucleus and varies between isotopes of the same element.
Why odd atomic number elements have 2 isotopes?
I don't know where you got the notion that elements of odd atomic numbers have two isotopes, but we don't have to look far for a counterexample: hydrogen... atomic number 1... has not one, not two, but THREE isotopes that exist for meaningful lengths of time. If you mean STABLE isotopes, then we have to go a bit further: the first four elements of odd atomic number (hydrogen, lithium, boron, nitrogen) do in fact have two stable isotopes. However, at the fifth we find our counterexample: fluorine (atomic number 9) has only one stable isotope, fluorine-19. Furthermore, helium (atomic number 2) ALSO has two stable isotopes, so we can't even invert the original question and ask why EVEN atomic number elements DO NOT have two isotopes. The question is therefore meaningless, as it's asking for an explanation of something that does not, in fact, actually happen.
