Give me periodic table full notes

Here are the key notes:

1. Periods: These are the horizontal rows. Elements in the same period have the same number of electron shells. There are 7 periods.

2. Groups: These are the vertical columns. Elements in the same group typically have similar chemical properties because they have the same number of valence electrons (electrons in the outermost shell). There are 18 groups.

3. Blocks: The table is divided into blocks based on the orbital type in which the last electron is added:

   • s-block: Groups 1 and 2.
   • p-block: Groups 13 to 18.
   • d-block: Groups 3 to 12 (transition metals).
   • f-block: Lanthanides and Actinides (inner transition metals).

4. Element Classification:

   • Metals: Generally found on the left side and center of the table. They are typically shiny, malleable, ductile, and good conductors of heat and electricity.
   • Nonmetals: Found on the upper right side. They are generally poor conductors and exist in various states (gas, liquid, solid) at room temperature.
   • Metalloids (or Semimetals): Found along the "staircase" line separating metals and nonmetals. They have properties of both metals and nonmetals.

5. Trends in Properties:

   • Atomic Radius: Generally decreases across a period (left to right) and increases down a group (top to bottom).
   • Ionization Energy: Generally increases across a period and decreases down a group. It's the energy required to remove an electron.
   • Electronegativity: Generally increases across a period and decreases down a group. It's the tendency of an atom to attract electrons in a chemical bond.
   • Metallic Character: Decreases across a period and increases down a group.

6. Key Groups:

   • Group 1 (Alkali Metals): Highly reactive metals.
   • Group 2 (Alkaline Earth Metals): Reactive metals, less so than alkali metals.
   • Group 17 (Halogens): Highly reactive nonmetals.
   • Group 18 (Noble Gases): Very unreactive gases.