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Chemistry, 22.06.2019 07:30
11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg
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The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.
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Chemistry, 22.06.2019 13:00
Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table
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Ecrire la formule chimique du dihydrogene. representer son modele moleculere...
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