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What are the characteristic properties of s-block elements?

Answer explanation

Characteristic properties of s-block elements include having one or two valence electrons, being highly reactive, and forming alkaline solutions when combined with water.

What is the trend in metallic character down the s-block elements?

Answer explanation

The trend in metallic character down the s-block elements increases. As you move down the group, the atomic size increases, leading to easier loss of electrons and higher metallic character.

Explain the variation in electronegativity across Group I and Group II s-block elements.

Answer explanation

Electronegativity decreases down Group I and Group II due to increasing atomic size and shielding effect, reducing the attraction for electrons.

Describe the formation of basic oxides and hydroxides by s-block elements.

Answer explanation

S-block elements form basic oxides and hydroxides by donating electrons to oxygen or hydroxide ions, resulting in the formation of ionic compounds with a basic pH.

What are the fixed oxidation states of Group I and Group II s-block elements?

Explain the characteristic flame colors produced by s-block elements.

Answer explanation

S-block elements produce characteristic flame colors due to the excitation of electrons to higher energy levels and subsequent emission of light when returning to ground state.

Why do s-block metal ions have a weak tendency to form complexes?

Discuss the variation in atomic radii, ionization enthalpies, hydration enthalpies, and melting points of s-block elements.

Explain the trends in ionization enthalpy across Group I and Group II s-block elements.

Describe the hydration enthalpies of s-block elements and the general trends observed.