Modern Periodic Table Based on atomic number Consists of 7 periods and 18 groups Periodic law: Properties repeat periodically 🔹 s-Block Elements (Group 1 & 2) Valence electrons: 1 or 2 Includes Alkali metals & Alkaline earth metals Properties: Highly reactive Soft metals Form basic oxides Examples: Na, K, Mg, Ca 🔹 p-Block Elements (Group 13–18) Valence electrons: 3 to 8 Includes metals, non-metals, metalloids Important groups: Halogens (Group 17) Noble gases (Group 18) Form acidic/basic/amphoteric oxides 🔹 d-Block Elements (Transition Elements) Groups: 3–12 Properties: Show variable valency Form colored compounds Good conductors Examples: Fe, Cu, Zn 🔹 f-Block Elements (Inner Transition Elements) Includes: Lanthanides Actinides Placed at bottom of table Properties: Mostly radioactive (actinides) Used in nuclear energy and electronics 🔹 Periodic Trends Atomic Size – Decreases across, increases down Electronegativity – Increases across Metallic Character – Decreases across 🔹 Key Concept Understanding blocks helps in predicting chemical properties, bonding, and reactivity of elements. 👉 Follow for more easy content! or join our Whatsapp channel👇👇👇👇 https://whatsapp.com/channel/0029Vb7uiP0AYlUNkzs66y0o #Aspire_Coaching_Academy #Malakand #periodictable #chemistry #1MillionViewsOnMyFirstVideo - @aspire.coaching.a