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Inorganic chemistry is the part of the syllabus students most often call "just memorisation". The p-block, d- and f-block elements and coordination compounds appear in both the JEE (Main) 2026 syllabus and the NEET (UG)-2026 syllabus, and both list specifics such as the preparation and properties of K₂Cr₂O₇ and KMnO₄. There is real memory work here. The question is how to do it so the facts stay.
Why do rote lists fade so fast?
Copying a list five times feels like work, but most of that time is spent reading, not remembering. A review of ten study techniques by Dunlosky and colleagues (2013) rated practice testing and spaced practice as high utility, and rereading as low utility. In a study published in Science, Karpicke and Blunt (2011) found that practising retrieval produced more learning of science texts than making concept maps, including on questions that needed inference.
The second trap is cramming. Kornell (2009) had learners study word pairs with flashcards either spaced in one big stack or massed in small stacks. Spacing was more effective than massing for 90% of participants, yet after the first session 72% believed massing had worked better. Cramming feels better while you do it. It is not better a week later.
Step 1: Learn the trend before the fact
Many inorganic facts follow from a few ideas: atomic size, effective nuclear charge, electronegativity, available d-orbitals, and the inert pair effect. Learn those first, for each group.
Example. Instead of memorising "Tl⁺ is more stable than Tl³⁺" as a standalone line, learn the inert pair effect: down group 13, the ns² electrons are held more tightly and take part less in bonding, so the lower oxidation state becomes more stable. Now the thallium fact is a consequence, and you can work out the lead (+2 versus +4) case in group 14 the same way.
A test for each fact: can you say why it is true? If yes, it is part of a trend. If not, it is an exception, and it goes on a card.
Step 2: Turn exceptions and specifics into retrieval cards
Good cards ask one thing and make you produce the answer:
"What colour change shows dichromate turning to chromate, and what causes it?" (orange to yellow, on adding base)
"Why does nitrogen not form pentahalides while phosphorus does?" (no d-orbitals available in nitrogen's valence shell)
"Write the balanced equation for KMnO₄ oxidising Fe²⁺ in acid."
Avoid cards like "Properties of KMnO₄", which invite you to reread a paragraph. Our guide to flashcards that work has more examples for chemistry.
Step 3: Retrieve the whole table, not just cards
Once a week, take a blank sheet and draw the p-block from memory. Fill in, for each group, the common oxidation states, one characteristic compound and one exception. Then check against your book and correct in a different colour. Your corrections are your next week's cards.
Step 4: Space the reviews
A workable rhythm for a new block of elements:
Day 1: learn the trends, make cards.
Day 2: test all cards. Move the ones you got right to a "later" pile.
Day 5, day 12, day 26: test the "later" pile; anything you miss returns to the daily pile.
The Cepeda and colleagues (2006) review of 317 experiments found that the best gap between reviews grew as the time until the test grew, so stretch the gaps when your exam is months away. Our four-week spaced revision schedule lays this out in a calendar.
When a trend does not make sense
Cards cannot fix a trend you do not understand, such as why lanthanoid contraction makes zirconium and hafnium so alike. Look up that one idea properly. The Fermi Concept Library has every concept in chemistry with its own lesson and its place in the map, so you can see what a trend depends on before you go back to your cards.
Tonight, pick one group of the p-block, write its trends from memory, and make five "why" cards from the gaps.
