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Chemistry, 21.06.2019 19:10
Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?
Answers: 1
Chemistry, 22.06.2019 09:00
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?
Answers: 1
Chemistry, 22.06.2019 12:00
Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.
Answers: 3
Chemistry, 22.06.2019 21:00
How many neutrons does an element have if its atomic number is 50 and its mass number is 166
Answers: 1
Use the periodic table to write the electron configuration of gallium (Ga).
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