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Chemistry, 22.06.2019 00:00
Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.
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Chemistry, 22.06.2019 09:30
In apex! a liquid heated beyond a certain temperature becomes
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Chemistry, 22.06.2019 15:20
An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.
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Chemistry, 23.06.2019 01:00
An unsaturated hydrocarbon is a hydrogen-carbon compound with a. a network solid structure b. single bonds c. single bonds in a branched-chain structure d. double or triple bonds
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Mathematics, 08.10.2019 03:00
Mathematics, 08.10.2019 03:00
Mathematics, 08.10.2019 03:00
Mathematics, 08.10.2019 03:00
Mathematics, 08.10.2019 03:00
Mathematics, 08.10.2019 03:00
Chemistry, 08.10.2019 03:00
Mathematics, 08.10.2019 03:00
Mathematics, 08.10.2019 03:00
Mathematics, 08.10.2019 03:00
Mathematics, 08.10.2019 03:00