AQA Chem 1: Unit 1 Foundation Chemistry

AQA Chemistry Unit 1 Revision Questions.

What does atomic number, (Z) represent?
Number of protons
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What does mass number, (A) represent?
Number of protons + Number of neutrons
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What is the correct definiton for the term isotope?
Atoms with the same number of protons but different number of neutrons
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What is the order of events that happen in the mass spectrometer?
Ionisation, Acceleration, Delfection, Detection
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After being Ionised in the Mass Spectrometer what charge is left on the majority of atom/molecule?
1+
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About 5% of the atoms/molecules form 2+ charge?
True
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How are the positve ions accelerated in the Mass Spectrometer?
Attracted towards a negatively charged plate
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What do the ions speed depend upon?
Their Mass
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What deflects the ions?
Magnetic Field
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Heavier ions are defelcted less and lighter ions are deflected most?
True
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How is an ion detected?
Hit the detector, accept an electron, lose their charge and create a current
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what is on the x axis of a mass spectrum graph?
Mass/Charge ratio
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what is on the y axis of a mass spectrum graph?
Relative Abundance/ %
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Complete the electron arrangement of Chlorine 1s2 2s2 2p6
3s2 3p5
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Complete the electron arrangement of Chromium 1s2 2s2 2p6
3s2 3p6 3d5 4s1
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Complete the electron arrangement of Copper 1s2 2s2 2p6
3s2 3p6 4s1 3d10
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The definition for first ionisation energy is?
The energy required to remove one mole of electrons from one mole of atoms in a gaseous state
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General trend of ionisation energies down a group?
Decreases, distance of outer electron gets further away from the nucleus. Electrons in a higher energy level. More Shielding.
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General trend of ionisation energies across period?
Increase. More protons, therefore nucleur charge increases. Electrons enter same energy level, therefore smaller atomic radius. Similar shielding.
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General trend of atomic radius of period 3 elemts, Na ---> Cl?
Decreases, more protons, similar shielding
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A deviation in ionisation energies in period 3.
Sulphurs ionisation energy is less than Phosphorus
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Why does the above deviation occur?
Paired electron, in 3p orbital. And they repel
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Other cards in this set

Card 2

Front

What does mass number, (A) represent?

Back

Number of protons + Number of neutrons

Card 3

Front

What is the correct definiton for the term isotope?

Back

Preview of the front of card 3

Card 4

Front

What is the order of events that happen in the mass spectrometer?

Back

Preview of the front of card 4

Card 5

Front

After being Ionised in the Mass Spectrometer what charge is left on the majority of atom/molecule?

Back

Preview of the front of card 5
View more cards

Comments

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according to the spec, (A) is mass number not atomic number

Goldengloss

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Oops, sorry about that. Genuine mistake "/ But thank you for pointing that out :)

Molly

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Great quiz!! Works for different boards as well. Thanks :)

:) PurpleJaguar (: - Team GR

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This is really helpful

Thanks a lot :)

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