Drawing diagrams of electronic configurations
3 marks · EasyThe table below lists three elements and their atomic numbers.
| Element | Atomic number |
|---|---|
| Lithium | 3 |
| Beryllium | 4 |
| Oxygen | 8 |
Complete the table by writing the number of electrons in each shell for each element.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
Must show: correct numbers in each shell per element
Common mistakes: putting too many in first shell
Show mark scheme and worked solution
Marking points
B1 · 1 mark · Lithium: 2, 1.
B1 · 1 mark · Beryllium: 2, 2.
B1 · 1 mark · Oxygen: 2, 6.
Worked solution
| Element | Atomic number | No. of electrons in each shell |
|---|---|---|
| Lithium | 3 | 2, 1 |
| Beryllium | 4 | 2, 2 |
| Oxygen | 8 | 2, 6 |