The vertical columns on the periodic table are called groups or families on account of their comparative chemical way of behaving. Groups are marked at the highest point of every column.
Every one of the individuals from a group of components has a similar number of valence electrons and comparable compound properties. The horizontal rows on the periodic table are called periods. As a rule, the nuclear range diminishes across a period and increments down a gathering. Vertical columns are components with comparable properties. This is on the grounds that they have a similar number of electrons in their external shell. It is the number of electrons in the external shell that generally decides how a component responds to different components. The horizontal rows are not all that huge.
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