Atomic Structure - Key Questions AS Chem AQA

Hey guys,

I created this to help with my unit 1 revision, I hope it can help you guys.

These are just questions on atomic structure, I am going to make similar revision cards for each of the other topics of unit 1. I hope these can be of use to you.

Please comment and rate thanks a lot :)

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What are the three fundamental atomic particles?
Proton, Neutron and Electron
1 of 18
What is the atomic number of an atom?
The number of protons in an atom therefore also the amount of electrons.
2 of 18
What is mass number?
The total number of protons and neutrons in an atom
3 of 18
Define an isotope
Atoms of the same element with the same amount of protons but each have a different number of neutrons
4 of 18
True or False Isotopes of an element have the same chemical properties?
True, because they have the same electronic configuration
5 of 18
What are the uses of a mass spectrometer?
To separate ions out which have a different mass and to help identify complex molecules with the help of their Mr
6 of 18
Explain what happens in vaporisation in mass spectrometry
A sample is vaporised so that it is in the gaseous state
7 of 18
What happens in ionisation in mass spectrometry?
An electron gun fires high energy electrons at the sample causing positive ions to form
8 of 18
What happens in acceleration in mass spectrometry?
Ions are accelerated by an electric field, the ions are focussed into a beam by passing through a series of slits
9 of 18
Explain what happens in deflection
The beam of electrons is deflected by a strong magnetic field, magnitude depends on the m/z ratio- a small m/z value means large deflection
10 of 18
How would you work out relative abundance from mass spectrum data?
(The sum of each of the relative mass of each isotope x fractional abundance of each isotope) / the sum of each of the relative abundances or divide by 100 if you are working out percentage
11 of 18
How do you find out relative molecular mass from mass spectrum data?
The peak with the highest m/z value is usually the Mr of the element
12 of 18
State three things about the electron arrangement in atoms
1.Electrons are found in energy levels (shells) 2. The energy level with the lowest energy is closest to the nucleus 3. Electrons occupy the lowest energy levels when in the ground state
13 of 18
How many electrons can fit into an orbital?
2 electrons are oppositely spin paired
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Which block s,p or d does Osmium belong to?
d block
15 of 18
Define first ionisation energy
The amount of energy required to remove one mole of electrons from a gaseous atom
16 of 18
Explain the trend in first ionisation energies
Decreases down a group because the outer electron is more shielded from the attraction of the nucleus
17 of 18
Explain the discontinuity between group 2 and 3 elements
Group 3 outer electron easier to remove than group 2 because gp 2 outer electron in 2s or 3s orbital, gp 3 outer electrons are in 2p or 3p which are higher in energy and therefore experiences more shielding
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Other cards in this set

Card 2

Front

What is the atomic number of an atom?

Back

The number of protons in an atom therefore also the amount of electrons.

Card 3

Front

What is mass number?

Back

Preview of the front of card 3

Card 4

Front

Define an isotope

Back

Preview of the front of card 4

Card 5

Front

True or False Isotopes of an element have the same chemical properties?

Back

Preview of the front of card 5
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