First, shrink the problem
Nobody needs to memorize all 118 elements in order — and trying to is the fastest way to give up. NCTB exams ask for the first twenty elements, the family names of the main groups, and the ability to read an element's position from its electron configuration. That is a much smaller, more structured job: about twenty names, plus a handful of "family" stories that cover dozens of elements at once.
The technique that actually works is chunking: your brain remembers stories and families far better than it remembers number-ordered lists. Learn the alkali metals as one family, the halogens as another, the noble gases as a third — then the "list" collapses into five or six memorable groups.
The first 20 in Bangla
Read this line aloud a few times — each key sound carries one element in atomic-number order, H(1) to Ca(20):
হালিমা বলে — লিটন বেকার; কারিগর নাও, অপু ফেল। না মানে ম্যাগনেশিয়াম, আলু সিলে পারবে না — সালেহা আর্গন খোঁজে, ক্যালকুলাসে টাইম পাই।
Every mnemonic works only when you also know the mapping, so pair the sentence with the split below. Say the sentence, then say the elements, then say the sentence again — three passes is usually enough for the sequence to stick.
- হালিমা = H হাইড্রোজেন (১), বলে = He হিলিয়াম (২)
- লিটন = Li লিথিয়াম (৩), বেকার = Be বেরিলিয়াম (৪)
- কারিগর = B বোরন (৫), নাও = N নাইট্রোজেন (৭) — মাঝে C কার্বন (৬), O অক্সিজেন (৮)
- অপু = F ফ্লোরিন (৯)… ফেল = Ne নিয়ন (১০)
- না-মানে = Na সোডিয়াম (১১), Mg ম্যাগনেশিয়াম (১২)
- আলু = Al অ্যালুমিনিয়াম (১৩), সিলে = Si সিলিকন (১৪)
- পারবে-না = P ফসফরাস (১৫), S সালফার (১৬)
- সালেহা = Cl ক্লোরিন (১৭), আর্গন = Ar আর্গন (১৮)
- ক্যালকুলাস = K পটাসিয়াম (১৯), টাইম = Ca ক্যালসিয়াম (২০)
The first 20 in English
The classic English hooks are sillier — which is the point, because absurd is memorable: "Hi Helen, Little Beatrice Can Naturally Order Fries Never Asking Mother's Slight Approval, Since Clara's Casually Kind". Sentence-mnemonics beat rote recitation because each word hands you the next symbol; if you blank, the story carries you forward.
Families beat sequences
After the first twenty, stop memorising order and learn families: Group 1 (H, Li, Na, K, Rb, Cs, Fr) is the "one valence electron" family; Group 17 (F, Cl, Br, I, At, Ts) is the "one electron short" family; Group 18 (He, Ne, Ar, Kr, Xe, Rn, Og) is the "already full" family. Three stories, twenty elements, done. The mnemonics page on this site has ready-made bilingual hooks for these sequences.
Then test yourself the way exams actually work: not "recite the table" but "which element is this?" — a symbol, a group, a property. The quiz on this site draws exactly those kinds of questions, including ones built from the element notes themselves, so practice and exam end up the same muscle.
Space it out, sleep on it
Memory research is unambiguous: spaced repetition crushes last-night cramming. Ten minutes today, five tomorrow, three the day after — the sequence survives the week. And keep the retrieval honest: cover the list, write it from memory, then check. Recognising an answer feels like knowing; reproducing it is knowing.
You asked
1Do I need the f-block for exams?
For Class 9–10, no — lanthanides and actinides appear as a named footnote, not as a memorised sequence. Know what the f-block is and where it sits in the table layout; individual element names there are university territory.