A column of elements missed by Mendeleev is:
A)the halogens.
B)the noble gases.
C)the alkali metals.
D)the alkaline earth metals.

Name: A column of elements missed by Mendeleev is: A)the halogens. B)the noble gases. C)the alkali metals. D)the alkaline earth metals.
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Mendeleev's original periodic table, formulated in 1869, did not include the noble gases because they were not discovered until later. The first noble gas, argon, was discovered in 1894, after Mendeleev's periodic table was published.

A Column of Elements Missed by Mendeleev Is