Shielding

The video tutorial explores the reactivity of alkali metals with water, emphasizing the concept of shielding and its impact on atomic structure and reactivity trends. It explains how atomic radius and electron shells influence the ease of losing electrons, using a magnet analogy to illustrate the shielding effect. The tutorial also covers ionization energy and its decrease down a group in the periodic table, and discusses the reactivity of halogens and their electron affinity.

What happens to the reactivity of alkali metals as you move down the group in the periodic table?

Describe how the atomic radius changes as you move down Group One of the periodic table.

Explain the concept of shielding and its effect on the attraction between the nucleus and outermost electrons.

How does the number of electron shells affect the ionization energy of alkali metals?

What is the relationship between electron affinity and the reactivity of halogens?