According to reference table n, which pair of isotopes spontaneously decays?
(1) c-12 and n-1...
Chemistry, 21.08.2019 23:00 jstringe424
According to reference table n, which pair of isotopes spontaneously decays?
(1) c-12 and n-14 (3) c-14 and n-14
(2) c-12 and n-16 (4) c-14 and n-16
Answers: 1
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Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleevās model had all of the information correct in the first version. harmony is correct, because mendeleevās model made predictions that came true.
Answers: 1
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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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