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Which pair of elements is in the same group? | StemPy Lab
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Which pair of elements is in the same group?
Chemistry
Easy
High School (9–10)
General
The Periodic Table › Development of the Periodic Table
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StemPy Lab
Which pair of elements is in the same group?
Sodium, 2, 8, 1, and magnesium, 2, 8, 2
Sodium, 2, 8, 1, and potassium, 2, 8, 8, 1
Neon, 2, 8, and sodium, 2, 8, 1
Chlorine, 2, 8, 7, and argon, 2, 8, 8
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← Mendeleev predicted a density of 5.5 g/cm³ for eka-silicon. Germanium turned out to have 5.32 g/cm³. By what percentage of the true value was he off?
Mendeleev's table had no column for the noble gases. Why not? →
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The Periodic Table › Development of the Periodic Table
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