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Description
Flashcards by olivianwokenna, updated more than 1 year ago
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Created by olivianwokenna
about 10 years ago
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| Question | Answer |
| What is the relative mass of an electron? | 1/1840 |
| What is the relative charge of a proton? | +1 |
| What is mass number? | Number of protons and neutrons. You can remember this by reminding yourself that these are the only sub-atomic particles with a significant mass. |
| List the order of events in a mass spectrometer | Vaporisation, Ionisation, Acceleration, Deflection, Detection. (Vicky Is A Dancing Donut) |
| Why is ionisation an important part of mass spectrometry? | Ionisation is used to create positive ions, which can then be manipulated by electromagnets. (Acceleration and deflection). |
| What does a mass spectrometer measure? | m/z |
| What is relative atomic mass? | The ratio of the average mass of atoms of an element to 1/12 of the mass of an atom of carbon-12 |
| You have a very small abundance of ions with a low m/z. Why? | These are double charged ions which act like they have half the mass of a singly charged ion. |
| Complete the electron configuration for Mg+ | 1s2 2s2 2p6 3s1 |
| What is the definition for ionisation energy? | The energy required to remove a mole of electrons from a mole of isolated gaseous atoms. |
| Why is the second ionisation energy larger than than the first? | The electron is being removed from a positively charged ion. |
| What is meant by the term isotope? | Element with same number of protons, different number of neutrons. |
| How many neutrons are present in 52Cr? | 24 |
| How many protons are present in the element: 52Cr ? | 52-24= 28 |
| Why do isotopes have the same chemical properties? | They have the same number of electrons. |
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