Group and Period Classification

In the periodic table, elements are organized into columns called groups and rows called periods. Groups contain elements with similar properties and often the same number of valence electrons, which influence their chemical behavior. Periods are horizontal rows where properties change gradually across the table. This organization helps scientists understand the relationships and characteristics of elements, such as reactivity and bonding patterns. Essentially, groups tell you about similarities among elements, while periods show how properties evolve across different elements.