Every periodic trend. One page.
Stop hunting through NCERT. All the data, exceptions, and trends from s, p, d, and f blocks — organized, visual, and searchable.
Can you place each element in its correct position? Challenge yourself!
🧠 Click on the grid where each element belongs
Choose practice mode:
Reference guide for Acidic, Basic, and Amphoteric compounds
React with bases to form salts and water. Turn blue litmus red.
Boron trioxide
Higher oxidation state oxides of non-metals
Nitrogen & Phosphorus oxides
Sulfur, Selenium, Tellurium oxides
Dichlorine heptoxide
Manganese(VII) oxide, Chromium(VI) oxide
React with acids to form salts and water. Turn red litmus blue.
Alkali & Alkaline Earth metal oxides
Indium & Thallium oxides
Bismuth(III) oxide
Chromium(II) oxide, Vanadium(III) oxide
Lanthanoid oxides and hydroxides
React with both acids and bases. Show dual behavior.
Aluminium & Gallium oxides
Tin & Lead oxides
Arsenic & Antimony oxides
Chromium(III) oxide
V₂O₅ predominantly acidic, BeO & ZnO from diagonal relationship
Based on NCERT Chemistry • Acidic oxides react with bases, Basic oxides react with acids, Amphoteric oxides react with both
30 questions • Complete Periodicity chapter
30 challenging questions from the lines of NCERT to master the Periodicity chapter — from atomic radius to oxidation states.
🎯 This isn't just practice — it's your final checkpoint before the exam!