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Why do we use the term formula unit for ionic compounds instead of the term molecule? Select all that apply.


A) In ionic compounds the ratio between cations and anions is given by the formula unit. The term is incorrect because ionic compounds exist as molecules.

B) In ionic compounds the ratio between cations and anions is given by the formula for the molecule.

C) lonic compounds consist of cations and anions present in a constant ratio.

D) lonic compounds consist of continuous arrays of cations and anions.

Answer :

BATOLISISGO

We use the term formula unit for ionic compounds because ;

  • Ionic compounds consist of cations and anions present in constant ratio ( C )
  • Ionic compounds consist of continuous arrays of cations and anions ( D )

The molecule of an ionic compound gets attached to another molecule of an ionic compound via electrostatic force of attraction. this form of attraction between the molecules forms an arranged lattice structure. and due to this well arranged lattice structure an ionic compound can be termed as a Formula unit and not molecule.

Hence the correct options are as listed above

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