| Penny Type | Number of Pennies | Percent Abundance | Total Mass (g) | Average Mass (g) | |------------|------------------|-------------------|----------------|------------------| | Pre-1982 | 12 | 60.0% | 37.20 | 3.10 | | Post-1982 | 8 | 40.0% | 20.00 | 2.50 | | | 20 | 100% | 57.20 | — |
Most lab reports require students to answer analysis questions. Below are the answers to the most common analysis questions found in the . isotopes of pennium lab answer key
Note: These masses are the accepted standards for the lab. Slight variations (e.g., 3.11g or 2.49g) are normal depending on the calibration of the balance. | Penny Type | Number of Pennies |