Question

Classify the following into molecular, ionic, metallic and covalent solids :
SiC, CaF2, l2, Mg.​

Answer 1

Explanation:

Tetra phosphorus decoxide (P4O10) Molecular

(ii) Ammonium phosphate (NH4)3PO4 Ionic

(iii) SiC Network (covalent)

(iv) I2 Molecular

(v) P4 Molecular

(vi) Plastic. Amorphous

(vii) Graphite Network (covalent)

(viii) Brass Metallic

(ix) Rb Metallic

(x) LiBr Ionic

(xi) Si

Answer 2

Given substances are classified as follows.

SiC and $I_{2}$ - covalent solid

$CaF_{2}$ - ionic solid

Mg - metallic solid

Explanation:

When a atoms of a compound chemically combine together by transfer of electrons then the compound formed is known as an ionic compound. Generally, chemical combination of a metal and a non-metal forms an ionic compound.

For example, $CaF_{2}$ is an ionic compound.

When two atoms chemically combine together by sharing of electrons then the compound formed is known as a covalent compound. Generally, when two non-metals combine together then they form a covalent compound.

For example, $I_{2}$ and SiC are a covalent compounds.

A metallic solid is defined a substance which contains atoms of a metal only. For example, Mg is a metallic solid.

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Tetra phosphorus decoxide (P4O10) Molecular

(ii) Ammonium phosphate (NH4)3PO4 Ionic

(iii) SiC Network (covalent)

(iv) I2 Molecular

(v) P4 Molecular