Atomic Structure AS

olivianwokenna
Flashcards by olivianwokenna, updated more than 1 year ago
olivianwokenna
Created by olivianwokenna over 7 years ago
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Flash cards based on AQA AS Chemistry syllabus.

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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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