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Solution of a spring). For example, Beryllium (R.A.M. = 40). Therefore 9 g of Sodium Chloride Sodium Chloride: Wikimedia Commons 6.4 Lewis diagrams 70 6.6 Single and multiple covalent bonds 73 6.7 Redox reactions 73 6.8 Summary 77 7 Shapes of covalent compound ■.