Question

Which among the following is/are the properties of s-block elements?

• A. Low ionization energy.
• B. High electronegativity.
• C. Non-Metallic nature.
• D. Reactivity decreases down the group.

Answer 1

The correct option is A Low ionization energy.

Ionization energy is the energy required to remove an electron from the outermost shell of an atom. S-block elements have relatively large atomic size. Due to this, the attractive force of the nucleus on the valence electrons is low. As a result, the energy required to remove electrons is low. Hence s-block elements posses low ionization energy. S-block elements have low electronegativity and the reactivity increases down the group. These elements are metallic in nature.