What do the vertical columns on the periodic table tell us?
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Chemistry, 22.06.2019 08:00
This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.
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Chemistry, 22.06.2019 09:00
Ineed to find the answer of this question because i dont understand it
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Chemistry, 22.06.2019 15:00
Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.
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Chemistry, 26.07.2019 13:10
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History, 26.07.2019 13:10
History, 26.07.2019 13:10