Ionisation Energies

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  • Created by: Heather
  • Created on: 04-10-14 18:13
What is ionisation energy?
The measure of energy needed to remove electrons one by one in the gaseous state
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What is ionisation energy measured in?
kJ mol-1
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Which electron would you remove first?
The outer electron from the outermost energy level
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Does the second electron removed need more or less energy than the first and why?
More energy as the electrons are getting closer to the proton's positive attraction so needs larger energy to remvoe it,
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What is the trend in the periodic table for first ionisation energies and why?
Ionisation energies generally increase across a period becuase the nucleur charge is increasing and this makes it more difficult to remvoe an electron,
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AS we go down group 2, describe the first ionisation energies?
They decrease as the oputer electrons is in a main level that gets further away from the nucleus in each case,
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Other cards in this set

Card 2

Front

What is ionisation energy measured in?

Back

kJ mol-1

Card 3

Front

Which electron would you remove first?

Back

Preview of the front of card 3

Card 4

Front

Does the second electron removed need more or less energy than the first and why?

Back

Preview of the front of card 4

Card 5

Front

What is the trend in the periodic table for first ionisation energies and why?

Back

Preview of the front of card 5
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