ChemistryMediumHigh School (11–12)The Periodic Table › Development of the Periodic TableA-LevelAPBoard ExamIB
Created by StemPy LabIn Newlands' arrangement, which pair ended up in the same column although they behave very differently?
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← Mendeleev predicted an element with an oxide of formula E₂O₃, a chloride ECl₃ and a melting point so low that the metal would melt in a warm hand. Which element fitted it?By Moseley's law √(ν) is proportional to (Z - 1). Element Z = 21 gives X-rays of frequency f. What frequency does element Z = 41 give? →
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