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An atom of an element has 54 protons. Some of the elements atoms have 77 neutrons, while other atoms have 79 neutrons. What are the atomic numbers and mass numbers of the two types of atoms of this element?
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If you want to create an electrical current, which situation would produce a solution capable of this
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Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.
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How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.
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An atom of an element has 54 protons. Some of the elements atoms have 77 neutrons, while other atoms...
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