Questions - the Rutherford-Bohr model
Question
Describe in detail the present model of the atom known as the Rutherford-Bohr model.
Name the particles that make up the atom, their mass and their location.
| Relative charge | Relative mass | Location | |
| Proton | +1 | 1 | Inside the nucleus |
| Neutron | 0 | 1 | Inside the nucleus |
| Electron | -1 | \(\frac{\text{1}}{\text{1840}}\) | Orbiting the nucleus |
| Proton | |
| Relative charge | +1 |
| Relative mass | 1 |
| Location | Inside the nucleus |
| Neutron | |
| Relative charge | 0 |
| Relative mass | 1 |
| Location | Inside the nucleus |
| Electron | |
| Relative charge | -1 |
| Relative mass | \(\frac{\text{1}}{\text{1840}}\) |
| Location | Orbiting the nucleus |
Question
The element of potassium has the symbol K.
The nucleus of an atom of potassium contains 19 protons and 20 neutrons.
Using this information complete the symbol below:
\(_{?}^{?}\textrm{K}\)
There are 19 protons and so atomic number Z = 19.
There are 19 protons and 20 neutrons and so the mass number A = 19 + 20 = 39.
\(_{19}^{39}\textrm{K}\)
Question
The element sodium has the symbol \(_{11}^{23}\textrm{Na}\).
How many protons, neutrons and electrons can be found in the nucleus of a sodium atom?
There atomic number Z = 11 and so there are 11 protons.
The mass number A = 23.
The number of neutrons N = A - Z = 23 - 11 = 12 neutrons.
There are no electrons in the nucleus of a sodium atom.
There are 11 protons, 12 neutrons and 0 electrons inside a sodium nucleus.