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| - The atomic mass of an element is how many protons and neutrons there are in the atom. This is often not an integer, because of isotopes.
- The atomic mass of a chemical element is the mass, measured in amus.
- In reference to a certain isotope of a chemical element, atomic mass though also called relative atomic mass is the mass of one atom of the isotope expressed in units (atomic mass unit, amu) such that the Carbon-12 isotope has an atomic mass of exactly 12. No other isotope mass works out to a whole number due to the effects of binding energy. The atomic or isotope mass number is the sum of the neutrons and protons in the nucleus of the atom. Mass number is always a whole number and is simply a sum of the nucleons within the nucleus of the isotope.
- Prior to the introduction of the Atomic Mass, Christian Scientists did not have a standardized Sunday service. From the founding of The First Church of Christ, Scientist in Boston in 1879, each other church was founded separately, without any influence from each other. Despite this, their liturgies were strikingly similar. This chain of events is pointed to by members of the church as evidence of divine intervention in the creation of the church and is known as the "Spontaneous Generation". This continued for a number of decades, eventually culminating in the church spreading across the United States as well as some areas in Canada and Europe.
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| abstract
| - In reference to a certain isotope of a chemical element, atomic mass though also called relative atomic mass is the mass of one atom of the isotope expressed in units (atomic mass unit, amu) such that the Carbon-12 isotope has an atomic mass of exactly 12. No other isotope mass works out to a whole number due to the effects of binding energy. The atomic or isotope mass number is the sum of the neutrons and protons in the nucleus of the atom. Mass number is always a whole number and is simply a sum of the nucleons within the nucleus of the isotope. In reference to a certain chemical element, atomic mass (also called relative atomic mass or average atomic mass) as shown in the periodic table is the average atomic mass of the chemical element's isotopes. The average is weighted by the relative natural abundances of the element's isotopes. This is the atomic mass used in stoichiometric calculations. This is usually used a a mass in grams of one mole of the element's atoms, often referred to as the gram atomic mass or molar mass. The old term atomic weight is being phased out slowly and being replaced by relative atomic mass, in most current usage. A similar definition applies to molecules; it is then called molecular mass. It turns out that one can compute the molecular mass of a compound by adding the atomic masses of its constituent atoms guided by the ratios of elements given in the chemical formula. A similar formula mass can be calculated for those compounds which do not form molecules. Direct comparison and measurement of the masses of atoms and molecules is achieved with mass spectrometry. One mole of a substance always contains exactly the atomic or molecular mass of that substance, expressed in grams. For example, the atomic mass of iron is 55.847, and therefore one mole of iron atoms has a mass of 55.847 grams.
- Prior to the introduction of the Atomic Mass, Christian Scientists did not have a standardized Sunday service. From the founding of The First Church of Christ, Scientist in Boston in 1879, each other church was founded separately, without any influence from each other. Despite this, their liturgies were strikingly similar. This chain of events is pointed to by members of the church as evidence of divine intervention in the creation of the church and is known as the "Spontaneous Generation". This continued for a number of decades, eventually culminating in the church spreading across the United States as well as some areas in Canada and Europe. The idea of merging all of these separate yet similar churches was first proposed in 1921 by Albert Einstein. Having won the Nobel Prize in Physics that year, Einstein's proposal carried considerable clout, and the sheer majesty of his hairstyle brought any remaining naysayers over to his side. Talks were immediately held to combine the churches into one centralized church with a structural hierarchy. These talks concluded in 1922 with the creation of the centralized Church of Christ, Scientist in what is now known as the "Ecclesiastical Fusion". This new church, however, still did not have its own service. While the central organ of the Church of Christ, Scientist produced lists of recommendations for services, a full structure was not proposed until 1947 by the American "father of the atomic bomb" J. Robert Oppenheimer. He advised the creation of a service modelled on that of the Roman Catholic Church, which he called the "Critical Mass". This proposal ultimately fell through due to the fact that Oppenheimer was not a member of the church or even a Christian, but was rather Jewish. Attempts to point out that Einstein, father of the Ecclesiastical Fusion, was also Jewish by ethnicity were also ignored, mainly because Oppenheimer's hairstyle was rather unspectacular. Nevertheless, Oppenheimer's ideas for the church still retained a small audience. Among them was fellow Manhattan Project researcher Glenn T. Seaborg. Seaborg waited for the clamour over Oppenheimer's original proposal to die down, fine tuning its specifics before reintroducing it in 1951 as the "Atomic Mass". Just like Einstein thirty years earlier, Seaborg's Nobel Prize in Chemistry that year added significant star power to the idea, and it was adopted January 1, 1952. To this day, the service has remained virtually unchanged from Seaborg's original plans.
- The atomic mass of an element is how many protons and neutrons there are in the atom. This is often not an integer, because of isotopes.
- The atomic mass of a chemical element is the mass, measured in amus.
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