Are elements with similar chemical properties more likely to be found in the same period or in the same group Explain your answer?

Elements with similar chemical properties are more likely to be found in the same group (column) of the Periodic Table. This is because elements in the same group have the same number of valence electrons, which largely determines their chemical behavior and reactivity. In contrast, elements in the same period (row) have the same number of electron shells but can have different valence electron configurations, leading to varying chemical properties. Thus, the grouping by columns reflects similarities in chemical characteristics.