10. Sodium chloride is formed by ionic bonding a. How an ionic bond is fomed? b. Draw electron dot diagram for the formation of ionic bond in NaCl molecule.
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Sodium (Na) and Magnesium (Mg) have 1 and 2 electrons respectively in the outermost shells of their atoms, so they lose their electrons to achieve the inert gas electron configuration of eight valence electrons and form positively charged ions or cations.
NaSodium atomKLM2,8,1MgMagnesium atomKLM2, 8, 2−−e−2e−−→−−→−2, 8Na+Sodium ionKL2, 8Mg2+Magnesium ionKL
On the other hand Cl has even electrons in its atom so it gains one electron to acquire inert gas configuration and forms negatively charged ion or an anion.
ClChlorine atomKLM2,8,7+e−→Cl−Chloride ionKLM2, 8,8
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