✓ 3 MARKS
Numericals
🔥 APPEARED IN 3 BOARD SETS
Define binding energy (BE) of a nucleus. An unstable nucleus has mass number $\text{A} = 240$ and $\frac{\text{BE}}{\text{A}} = 7.6\text{ MeV}$. It splits in two fragments, each of $\text{A} = 120$ with $\frac{\text{BE}}{\text{A}} = 8.5\text{ MeV}$. Calculate the energy released.
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2025 | Series Other | Set 1 | Question 26 |
| CBSE 2025 | Series Other | Set 1 | Question 25 |
| CBSE 2025 | Series Other | Set 1 | Question 24 |
02 // OFFICIAL CBSE MARKING SCHEME BREAKDOWN
- Step 1: Stating the fundamental formula / law statement (+1 Mark)
- Step 2: Intermediate mathematical substitution or proof steps (+1 Mark)
- Step 3: Correct final value or conclusion with mandatory SI units (+1 Mark)