Main Group Chemistry, (tutorial Chemistry Texts) Direct

Highly reactive, +1 oxidation state. They are so soft they can be cut with a knife and react violently with water to form hydroxides and hydrogen gas.

Used to predict the shapes of p-block molecules based on electron pair repulsion. Quick Summary Table Valence Electrons Common Oxidation State Alkali Metals ns1n s to the first power Alkaline Earth ns2n s squared Carbon Group ns2np2n s squared n p squared ns2np5n s squared n p to the fifth power

The bridge. Carbon is the basis of life; Silicon is the basis of technology. MAIN GROUP CHEMISTRY, (Tutorial Chemistry Texts)

electron shells, leading to predictable trends in reactivity, bonding, and geometry. 1. Periodic Trends (The Foundation)

The ability to attract electrons. Fluorine is the king here. 2. The s-Block (Groups 1 & 2) Highly reactive, +1 oxidation state

This is where chemistry gets diverse, moving from metals to metalloids to non-metals.

Traditionally "inert," though heavier gases like Xenon can form compounds with highly electronegative atoms (e.g., XeF4cap X e cap F sub 4 4. Key Concepts to Master The Inert Pair Effect: Down Groups 13–16, the electrons become harder to remove. This explains why Lead ( ) prefers a +2 state instead of +4. Quick Summary Table Valence Electrons Common Oxidation State

+2 oxidation state. Harder and less reactive than Group 1, but still form basic oxides. Magnesium and Calcium are biologically essential. 3. The p-Block (Groups 13–18)