* Strong bases are typically formed from elements with LOW electronegativity. Electronegativity is the ability of an atom to attract electrons. Highly electronegative atoms tend to hold onto their electrons tightly, making them less likely to donate them and form strong bases.

* Strong bases often contain negatively charged atoms. The negative charge indicates the atom has gained an electron, making it more likely to donate it to a proton (H+), which is the basis of base strength.

* Resonance stabilization can enhance base strength. When a negative charge can be delocalized through resonance, it becomes more stable. This stability makes it easier for the species to donate an electron, making it a stronger base.

Here's a better explanation:

Strong bases are typically formed by elements with low electronegativity (like alkali metals and alkaline earth metals). The reason is that these elements have a low attraction for their electrons and are more likely to lose them, forming a negatively charged ion. This negatively charged ion readily accepts protons, making it a strong base.

Examples:

* NaOH (Sodium Hydroxide): Sodium (Na) has low electronegativity, and the hydroxide ion (OH-) is highly reactive with protons.

* KOH (Potassium Hydroxide): Similar to NaOH, Potassium (K) has low electronegativity.

Resonance Stabilization:

Some strong bases have resonance stabilization. For example, the amide ion (NH2-) has resonance structures that distribute the negative charge, making it a stronger base.

Remember: Base strength is directly related to the tendency of a species to donate electrons and accept protons. The factors influencing this tendency include:

* Electronegativity: Lower electronegativity = Stronger base

* Charge: More negative charge = Stronger base

* Resonance: Resonance stabilization can increase base strength.