Anions in Action: Their Role in Ionic Bonding

The video tutorial covers the concept of electron affinity, explaining how atoms with high electron affinity easily form anions, using sodium chloride and sodium bromide as examples. It discusses the stability of anions with low negative charges, highlighting the ease of forming fluoride ions compared to oxide and nitride ions. The tutorial also explains the concept of polarizability in ionic bonds, using lithium chloride as an example, and how it leads to the sharing of electrons and solubility in organic solvents.

Which of the following statements best describes electron affinity?

• It is the energy released when an atom forms a covalent bond.

• It is the energy required to remove an electron from an atom.

• It is the measure of an atom's ability to accept electrons.

• It is the measure of an atom's ability to donate electrons.

Why does chlorine form anions more easily than bromine?

• Bromine has a higher ionization energy than chlorine.

• Chlorine has a higher electron affinity than bromine.

• Bromine has a more stable electron configuration than chlorine.

• Chlorine has a larger atomic radius than bromine.

What makes fluoride ions more stable compared to oxide ions?

• Fluoride ions have a complete octet configuration.

• Fluoride ions have a lower negative charge.

• Oxide ions have a higher positive charge.

• Oxide ions have a complete octet configuration.

What is the main reason additional energy is required to form oxide ions?

• There are strong repulsive forces between O- and the added electron.

• The oxide ion is positively charged.

• The oxide ion has a complete octet configuration.

• The oxide ion is more stable than the fluoride ion.

What is polarizability in the context of ionic bonds?

• The ability of an anion to repel a cation.

• The ability of an anion to attract a cation.

• The ability of a cation to distort the electron cloud of an anion.

• The ability of a cation to donate electrons to an anion.

How does the small size of lithium cation affect the chloride ion in lithium chloride?

• It repels the chloride ion completely.

• It increases the electron cloud of the chloride ion.

• It distorts the electron cloud of the chloride ion.

• It has no effect on the chloride ion.

Why does lithium chloride dissolve in organic solvents?

• Because it is a non-polar compound.

• Because it forms covalent bonds with organic solvents.

• Because it has a polar character due to polarization.

• Because it has a purely ionic character.