In the periodic table, elements with similar chemical properties occupy the same:

In the periodic table, elements with similar chemical properties occupy the same group or column. Each group typically contains elements that share similar configurations of their outer electrons, which are primarily responsible for chemical reactivity and bonding behavior. These elements demonstrate analogous characteristics in terms of their reactivity, ionization energies, electronegativity, and common oxidation states.

For example, the alkali metals (Group 1), such as lithium (Li), sodium (Na), and potassium (K), all exhibit high reactivity, particularly with water, and tend to form +1 ions. Similarly, the halogens (Group 17), like fluorine (F) and chlorine (Cl), are known for their tendency to gain an electron to achieve a stable electronic configuration. Understanding these groupings helps in predicting the outcomes of chemical reactions and the properties of various substances.