Teenage Depression statistics show that teen depression is a common problem 1  : About 20 percent of teens will experience teen depression before they reach adulthood. 2  Between 10 to 15 percent of teenagers have some symptoms of teen depression at any one time.
1. alkaline-relating to or containing an alkali; having a pH greater than 7; alkaline soils derived from chalk or limestone. alkalic. chemical science, chemistry-the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions.
The alkali metals are a group of elements in the periodic table. They are all in the first column of the periodic table. The only element in the first column that is not usually considered an alkali metal is hydrogen. Hydrogen and the alkali metals make up the group 1 elements of the periodic table.