Mendeleev arranged the known chemical elements in a table according to increasing

Which list of elements contains only metals?

Which of the following group 7A elements is most reactive?

Which of the following group 1A elements is most reactive?

The usefulness of Mendeleev's periodic table was confirmed by

The standard on which the atomic mass unit is based on the mass of a

Which general statement does NOT apply to metals?

In a periodic table, a set of properties repeats from

Group 7A of the periodic table contains the

To keep them from reacting, some highly reactive elements are stored in

Which statement is true about the metalloid silicon?

Mendeleev gave the name eka-aluminum to a (an)

Which statement is not true about the elements, F, Cl, and I

Which halogen is most likely to react

Which element is found in nature only in compounds?

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