Question

Identify the bonding in each of the following substances as ionic or covalent.

(a) NaCl (select)ioniccovalent

(b) H2 (select)covalentionic

(c) CH4 (select)covalentionic

(d) SiO2 (select)ioniccovalent

Answer 1

1) NaCl sodium chloride is IONIC compound with ionic bonding.

NaCl consists of Na⁺ and Cl^- ions. These ions are formed due to complete transfer of 1 valence electron form the valence shell of Na (11) to the valence shell of Cl (17).

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2) H₂ is COVALENT compound with covalent bonding.

H-H bond forms by mutual sharing of 2 (1 valence electron from each) electrons between 2 H atoms. Mutual sharing of electron leads to the formation of covalent bond.

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3) CH₄ Methane is a COVALENT compound with covalent bonding.

Each of 4 C-H bonds formed by mutual sharing of 2 elctrons (1 from C and 1 from H). 4H gives 4e and completes the octet of C (8) and own duplet state.

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4) SiO₂ Silicon dioxide is COVALENT compound with covalent bonding.

O=Si=O formed by mutual sharing of 8 electrons (4 from Si and 2 from each O).

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