what is the number of valence electron in an element of group 1 and group 18 respectively???
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atoms in Groups 1 and 2 have 1 and 2 valence electrons, respectively. Atoms in Groups 13 and 18 have 3 and 8 valence electrons, respectively. Valence electrons are responsible for the reactivity of an element. They determine how "willing" the elements are to bond with each other to form new compounds.
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the number of valence electron in an element of group 1 and group 18 respectively???
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