What is a group?
two or more people who, for longer than a few moments, interact with and influence one another and share a common goal.
In science, a group is a collection of atoms or elements that share similar chemical properties due to the presence of the same number of valence electrons in their outermost energy level. This results in similar physical and chemical behavior of the elements within a group. For example, the alkali metal group (Group 1) includes lithium, sodium, potassium, rubidium, cesium, and francium, all of which have one valence electron and exhibit similar reactive properties. Another example is the halogen group (Group 17), which includes fluorine, chlorine, bromine, iodine, and astatine, all of which have seven valence electrons and exhibit similar acidic properties. The periodic table is organized based on the arrangement of elements into groups and periods, providing a framework for understanding the chemical and physical properties of different elements.
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