The periodic table is an arrangment of the chemical elements, ordered by atomic number, into families, and by doing so illustrates the periodic properties of the elements. If we review the elements found in the second column of the periodic table, the alkali
earth metals, we know one characteristic common to all elements in this family, besides being metals, is that they are
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5
A)
solid at room temperature.
B)
not very reactive elements.
found deep in the layers of the mantle.
D)
react readily with other metals to form compounds.