| Atomic Number | Mass Number | Number of Neutrons | Number of Protons | Number of Electrons | Number of the Atomic Species |
|---|---|---|---|---|---|
9 | - | 10 | - | - | - |
16 | 32 | - | - | - | Sulphur |
- | 24 | - | 12 | - | - |
- | 2 | - | 1 | - | - |
- | 1 | 0 | 1 | 0 | - |
| Atomic Number | Mass Number | Number of Neutrons | Number of Protons | Number of Electrons | Number of the Atomic Species |
|---|---|---|---|---|---|
9 | 19 | 10 | 9 | 9 | Fluorine |
16 | 32 | 16 | 16 | 16 | Sulphur |
12 | 24 | 12 | 12 | 12 | Magnesium |
1 | 2 | 1 | 1 | 1 | Deuterium |
1 | 1 | 0 | 1 | 0 | Hydrogen ion |
| X | Y | |
|---|---|---|
| Protons | 6 | 6 |
| Neutrons | 6 | 6 |
∆ABC is an isosceles triangle in which AB = AC. Side BA is produced to D such that AD = AB (see Fig. 7.34). Show that ∠ BCD is a right angle.

(i) The kind of person the doctor is (money, possessions)
(ii) The kind of person he wants to be (appearance, ambition)