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*A vertical column in the periodic table is called a <b>group</b> or <b>family</b> **Elements in a group all have similar chemical and physical properties **The elements in a group have the same number of electrons in their outer shell. **Going from top to bottom,each element has one more occupied energy level http://www.shu.ac.uk/pri/scripts/resources/uploaded/images/atoms_pei2.jpg I A-Alkali metals IIA-Alkaline earth metals 0-Noble gases VIIA-Halogens
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