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Concept
Every known item of matter in the universe has some amount of mass, even if it is very small. But what about something so insignificant in mass that comparing it to a gram is like comparing a millimeter to the distance between Earth and the nearest galaxy? Obviously, special units are needed for such measurements; then again, one might ask why it is necessary to weigh atoms at all. One answer is that everything is made of atoms. More specifically, the work of a chemist requires the use of accurate atomic proportions in forming the molecules that make up a compound. The measurement of Atomic Mass was thus a historic challenge that had to be overcome, and the story of the ways that scientists met this challenge is an intriguing one.
For the source and more detailed information concerning this subject, click on the related links section (Answers.com) indicated below Isotopes are any of the different species of atom (Nuclides) of a chemical element each having different atomic mass (mass number).[1] Isotopes of an element have nuclei with the same number of protons (the same atomic number) but different numbers of neutrons. Therefore, isotopes have different mass numbers, which give the total number of nucleons, the number of protons plus neutrons. For the source and more detailed information concerning this subject, click on the related links section (Wikipedia) indicated below.
What else can I help you with?
What element has the isotopic mass of 209?
The element with the isotopic mass of 209 is Bismuth (Bi).
What is needed to find the average atomic mass of the element?
To find the average atomic mass of an element, you need to know the isotopic masses of each of its isotopes and their relative abundances. Multiply the isotopic mass of each isotope by its relative abundance, then sum these values to calculate the average atomic mass.
Which gas is heaviest nitrogen hydrogen or oxygen?
Nitrogen is heavier than hydrogen but lighter than oxygen. In terms of molecular weight, nitrogen has a molar mass of about 28 g/mol, oxygen has a molar mass of about 32 g/mol, and hydrogen has a molar mass of about 2 g/mol.
What is the isotopic symbol of boron?
B is the atomic symbol. a number of different Isotopes exist for this element.6B, 7B, 8B, and so on and so forth.
What letters are used to designate atomic number and mass number in isotopic notation of atoms?
The atomic number is denoted by the letter "Z" and the mass number is denoted by the letter "A" in isotopic notation of atoms.
What is the isotopic mass of phosphate?
The most common isotopic mass of the phospate group, PO3, is 79. The second most common isotopic mass is incredibly rare, but is 78. -------------------------------- Phosphate (PO4)3- has not an isotopic mass because it is not an isotope but it is an anion. The mass of this anion is 94,953 42.
What element has the isotopic mass of 209?
The element with the isotopic mass of 209 is Bismuth (Bi).
How do you calculate isotopic masses?
The atomic mass of isotopes is determined by mass spectrometry.
What relationship exist between the atomic mass and the isotopes?
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.
Is the isotopic mass of given isotope ever an exact while number?
No, the isotopic mass of an isotope is not an exact whole number because it accounts for the average mass of all the isotopes of that element found in nature, which have different masses due to varying numbers of neutrons. The isotopic mass is usually reported as a decimal number.
What is needed to find the average atomic mass of the element?
To find the average atomic mass of an element, you need to know the isotopic masses of each of its isotopes and their relative abundances. Multiply the isotopic mass of each isotope by its relative abundance, then sum these values to calculate the average atomic mass.
How is average weight of atomic mass computed?
the average atomic mass is computed by summing all isotopic weights of the isotopes of that element and then dividing this by the the total number of isotopes of that element (note that isotopic mass is exactly the same as atomic weight, except for isotopes).
How do you determine when isotopes are most abundant?
Isotopic composition is determined by mass spectrometry.
What is the average atomic mass of the element with the isotopic abundances shown?
90.7 amu
How do you find relative isotopic mass?
its the same as the mass number e.g. oxygen(-16) is 16, carbon-12 is 12 but carbon-13 is 13 because it has an extra neutron i think anyway Really? I thought that the relative istopic mass was a ratio of the average atomic mass of the element compared to the average atomic mass of carbon. For example chlorine has an average atomic mass of 37 and carbons atomic mass is 12 so its 37 divided by 12 which is about 3:1.
What is the isotopic notation for helium-4?
The isotopic notation for helium-4 is ^4He. This notation denotes the element's atomic number and mass number, which for helium-4 are 2 (atomic number) and 4 (mass number) respectively.
Which gas is heaviest nitrogen hydrogen or oxygen?
Nitrogen is heavier than hydrogen but lighter than oxygen. In terms of molecular weight, nitrogen has a molar mass of about 28 g/mol, oxygen has a molar mass of about 32 g/mol, and hydrogen has a molar mass of about 2 g/mol.
