Chemistry, 24.06.2019 16:30 emokid7822

Which statement demonstrates the periodic law? a. carbon and silicon, elements in group 14, have similar chemical properties. b. the atomic mass of boron, element 5, is greater than that of beryllium, element 4. c. sodium, a metal, is one of the most reactive elements. d. magnesium and aluminum, two metals, both conduct heat and electricity well.

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