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BaCl2 requires the largest amount of energy to break its ionic bond. This is because BaCl2 has a larger ionic radius compared to the other salts listed. The larger the ionic radius, the stronger the ionic bond, and the more energy is required to break it. LiF has the smallest ionic radius, followed by NaBr and Kl.

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The given figure represents a model of metals which are good conductors of heat and electricity.

The correct answer is Cr3(SO4)3 because the compound is made up of chromium (Cr) ions with a charge of +3 and sulfate (SO4) ions with a charge of -2. To balance the charges, three chromium ions are needed to combine with three sulfate ions. Therefore, the correct formula should be Cr3(SO4)3.

The statement "يعد عنصرا مختلفا عن الذرة المتعادلة" (It is a different element from the neutral atom) is the correct answer because it accurately describes Sc3+ as an ion with a positive charge, while Sc is the neutral atom.

The compound with a melting point of -100 can have either a polar covalent bond or a nonpolar covalent bond.

This answer suggests that the material represented by the given shape is a liquid because the particles are able to move easily and freely on top of each other.

The correct answer is 148 C. This is the melting point of Cr2O3, which is the compound chromium(III) oxide.

The data provided in the table states that ionic compounds have a high boiling point.