Chemistry, 14.07.2019 09:00 nadiasifuentes15
The half-life of radium-226 is 1590 years. if a sample contains 100 mg, how many mg will remain after 3000 years?
Answers: 1
Chemistry, 22.06.2019 02:00
The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?
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Which property of water causes water drops to bead on a freshly waxed car?
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Chemistry, 23.06.2019 06:30
Which of the following is true about the products formed during photosynthesis? (5 points) select one: a. they have the same mass as the mass of reactants. b. they are the same set of compounds as the reactants. c. they have more mass than the mass of reactants. d. they are chemically the same as the reactants.
Answers: 1
The half-life of radium-226 is 1590 years. if a sample contains 100 mg, how many mg will remain afte...
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