Select the alternative that is NOT correct: (Please step by step and Justify you

Question

Select the alternative that is NOT correct: (Please step by step and Justify your answer.

A) The energy required for the formation of an ionic bond is provided, for the most part, the attraction coulombic between ions of opposite charge.
B) The energy of the crystal lattice of a solid is the difference between the energy of the ions compactadosde a solid and ions far removed from a gas, always being positive.
C) The NaCl and KCl ionic solids with the same type of crystalline structure, but the Coulomb interaction is enhanced in NaCl due to the Na + ion having smaller ionic radius than ions K +, or NaCl ions are more strongly bonded they.
D) The non-metallic elements share electrons to form covalent bonds between them.
E) An atom with high electronegativity has high power to attract electrons. Thus, maiseletronegativo atom retains the lower part of electrons of the covalent bond.

Explanation / Answer

A] INCORRECT

ENergy is provided by ionisation , electron affinity and lattice energy are main

B] Correct -  Lattice energy is always positive. It's the energy change for the process of the ionic compound dissociating into the separated ions in the gas phase. The dissociated ions are always higher in energy than the ionic solid itself.

If you think you have a negative lattice energy, it's probably because you're thinking about the energy change for the reverse process, going from the dissociated ions to the ionic solid.

C] CORRECT

That is only one force, the K+ ion is larger than the Na+ ion, so the distance between the K+ and Cl- ions is greater than between Na+ and Cl-, decreasing the bond strength. Yes, KCl has a high bond energy, but not as high as NaCl.

So NaCl is strongly bonded

D] CORRECT

COvalent bonds are formed by sharing of electrons . It occurs mainly in nonmetallic elements .

E] CORRECT

An atom with high electronegativity has high power to attract electrons. Thus, maiseletronegativo atom retains the lower part of electrons of the covalent bond. Example polarisation of atoms

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