Properties and models of bonding

Question 1

A chemical bond formed by the transfer of electrons between atoms, creating charged ions.

Answer 1

Ionic Bond

Strong electrostatic attraction means ionic compounds have higher melting and boiling points. In contrast to solid state, molten or dissolved ionic compounds are good conductors of electricity as ions are free to move. Ionic compounds are brittle.

Question 2

A covalent bond is formed between two nonmetallic atoms by ————- electrons and nuclei of bonded atoms.

Answer 2

Shared

Covalently bonded compounds are usually non-conductor and have low melting and boiling points. Simple covalent compounds are usually liquid or gasses and giant covalent compounds like graphite, diamond, and silicon dioxide are solids.

Question 3

Metallic bonding

Answer 3

Metallic bonding is a type of chemical bonding that arises from the attraction between delocalized electrons and positively charged metal ions.

Delocalized electrons do not belong to any particular atom, and are free to move throughout the metal lattice. Metallic compounds required a huge amount of heat energy to melt.

Question 4

Relative bond strengths and bond lengths

Answer 4

Bond strength or bond energy is the amount of energy required to break a bond between two atoms, measured in kilojoules per mole (kJ/mol).

Bond strength and bond length are inversely proportional to each other. shorter bonds are stronger because the atoms are closer together, increasing the electrostatic attraction between them.

Question 5

Metallic compounds are?

Answer 5

Malleable and Ductile