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[DOC File]Basic Chemistry - astephensscience
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10.81 amu. Explain. Atomic weights are really average atomic masses, the sum of the mass of each naturally occurring isotope of an element times its fractional abundance. Each B atom will have the mass of one of the naturally occurring isotopes, while the atomic weight is an average value. 31.
atomic weight vs atomic mass

[DOC File]Chapter 1
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The atomic weight of an element or atomic mass of an element is the average of all naturally occurring isotopes and their weighted abundance. 12. What element is the current standard for the atomic weight …
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[DOCX File]VOCABULARY: cathode ray, subatomic particles, alpha ...
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Isotopes and Atomic Weight. Atomic weight. Close to mass number of most abundant isotope. Atomic weight reflects _____ Radioactivity _____ Heavy isotope. Tends to be unstable. Decomposes to more stable isotope. Radioactivity—_____ Molecules and Compounds _____—two or more like atoms combined chemically ...
why is atomic mass important

[DOC File]AP Chemistry: Course Introduction Sheet
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The element Luna has an atomic weight of 28.15 g/mol. Luna – 28 has a mass of 27.745 g/mol and Luna – 29 has a mass of 29.145 g/mol. Calculate the percent abundance of each isotope. The element Io has an atomic weight of 64.45 g/mol. It has two isotopes: Io – 63 with a mass of 63.245 g/mol and Io – 65 with a mass of 65.012 g/mol ...
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Honors Chemistry Worksheet – Atomic Structure
Formula weight = sum of atomic weights of the atoms in a formula; we can use the term molecular weight if the substance is a molecular formula or molar mass for either. Example: Find the formula weight of calcium nitrate.
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[DOC File]Chemistry I-Honors
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atomic weight – This is not a weight! It is the weighted average of the atomic masses for all isotopes of an element. This is why the atomic weight of carbon is 12.011 and not 12.00. (Most carbon is C12 , however about 1.1% of naturally occurring carbon is C13) amu – atomic mass unit approximately equal to the mass of a proton or a neutron.
atomic weight vs molecular weight

[DOC File]Isotopic Abundance
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Mass is the quantity of matter present; weight is a measure of the pull of gravity on matter and is measured in pounds or Newtons. However, it is common usage in chemistry to talk about the “gram formula weight” or “atomic weight”rather than the technically correct term “gram formula mass” or “molar mass.”
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[DOC File]Chapter 2: Atomic Structure and Inter-atomic Bonding
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4. SWBAT define, describe and use the periodic table to determine the following terms: atomic number, atomic weight, mass number, number of electrons, number of protons, and number of neutrons. 5. SWBAT summarize the laws of definite composition, multiple proportions and conservation of mass. 6.
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Difference Between Atomic Weight and Mass Number | Compare t…
5. Given: the mass of a neutron is 1.008665 amu [amu = atomic mass unit] the mass of a proton is 1.007274 amu (the mass of an electron is only 0.000549 amu so we will ignore it.) Find: (a) the atomic mass of the Bi-205 isotope (b) the atomic mass of the Bi-212 isotope
atomic weight vs atomic mass

Atomic weight and mass