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How many valence electrons do oxygen group elements have?

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A color-coded periodic table of the elements displays each element's symbol and atomic number, with categories such as alkali metals, noble gases, halogens, transition metals, and actinoid elements distinguished by different background colors. — oxygen group element Modern version of the periodic table of the elements (printable).

Elements in the oxygen group (Group 16 of the periodic table) have six valence electrons in their outermost shell.1

Because these elements possess six electrons in their outer shell, they typically tend to gain two additional electrons to achieve a stable configuration of eight, which results in the formation of ions with a double negative charge.1