Chemistry, 19.10.2019 21:00 jasmne4713
How is the atomic mass of an element calculated?
by taking the weighted averages of naturally occurring isotopes of that element
by determining the number of electrons in the outer orbital
by dividing its mass by that of the carbon-12 atom
by determining the number of protons in the nucleus
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Compare and contrast physical changes with chemical changes.
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Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?
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How is the atomic mass of an element calculated?
by taking the weighted averages of nat...
by taking the weighted averages of nat...
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