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Atomic Theory
| Question | Answer |
|---|---|
| What is the first model of the atom | The nuclear model |
| Assumptions of the nuclear model | 1. The nucleus contains most of the atom's mass 2. Electrons orbit the nucleus in a relatively empty space |
| Limitations of the nuclear model | Lacks detail about the electrons behaviour and arrangement |
| What is the second model of the atom | The Bohr model |
| What is an energy level | The fixed amount of energy of an electron in an atom |
| Assumptions of the Bohr model | 1. Bohr assumed electrons had fixed amounts of energy and could only occupy certain levels. 2. Bohr assumed that electrons travelled in specific orbits around the nucleus. |
| Limitations of the Bohr model | 1. The model didn't work for more complex atoms. 2. The model didn't take wave-particle duality into account 3. Bohr incorrectly believed that the exact electron location could be known at any time. 4. Bohr's model didn't account for sublevels. |
| What is wave-particle duality | That electrons travel in waves instead of fixed orbits. |
| What are sublevels | A subdivision of a main energy level consisting of one or more orbitals of the same energy. |
| What is the third model of an atom | Orbital Model |
| Assumptions of the Orbital model | 1. Electrons undergo wave-particle duality 2. Electrons travel around the nucleus in orbitals |
| Limitations of the Orbital Model | We can only assume where the electrons are and not their exact location. |
| What is an isotope | Two very similar atoms that have the same amount of protons but also different mass numbers. |
| What is the atomic number of an atom | The amount of protons found in the nucleus of the atom and the amount of electrons found in total on all orbitals |
| What is the mass number of an atom | The amount of protons and neutrons found in the nucleus of the atom. |
| What is the relative atomic mass | The total average weighted mass of all isotopes taking abundancy into account. |
| What is the numerical charge/mass/location of the proton | +1/1/nucleus |
| What is the numerical charge/mass/location of the neutron | 0/1/nucleus |
| What is the numerical charge, mass, location of the electron | -1, 1/1838, orbitals |
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Miki_Szn
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