Atomic structure

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  • Created by: quds
  • Created on: 04-03-18 22:07
Which fundamental particle would not be deflected by an electric field?
Neutron
1 of 8
State in terms of fundamental particles why the isotopes have similar chemical reactions.
They have the same electronic configuration
2 of 8
Explain why the second ionisation energy for boron is higher than the first ionisation energy for boron.
The electron is being removed from an orbital closer to the nucleus
3 of 8
Describe how ions are formed in a time of flight mass spectrometer.
Electro spray ionisation - a high voltage is applied to a sample in a polar solvent - the sample gains a proton forming MH+ Electron impact ionisation - the sample is bombarded by high energy electrons - the sample molecule looses an electron formin
4 of 8
Explain why it is necessary to ionise molecules when measuring their mass in a TOF mass spectrometer.
- ions will interact with and be accelerated by an electric field - only ions will create a current when hitting the detector
5 of 8
Outline how the TOF mass spectrometer is able to spreader two species to give two peaks.
-positive ions are accelerated by an electric field - to a constant kinetic energy - both ions have the same kinetic energy - the ion with a lower m/z value will move faster - the ion with a lower m/z value will reach the detector first
6 of 8
State the meaning of the term mass number of an isotope
The number of protons and neutrons
7 of 8
State the meaning of the term first ionisation energy
Energy needed to remove one mole of electrons from one mole of atoms. In there gaseous state to form one mole of gaseous ions
8 of 8

Other cards in this set

Card 2

Front

State in terms of fundamental particles why the isotopes have similar chemical reactions.

Back

They have the same electronic configuration

Card 3

Front

Explain why the second ionisation energy for boron is higher than the first ionisation energy for boron.

Back

Preview of the front of card 3

Card 4

Front

Describe how ions are formed in a time of flight mass spectrometer.

Back

Preview of the front of card 4

Card 5

Front

Explain why it is necessary to ionise molecules when measuring their mass in a TOF mass spectrometer.

Back

Preview of the front of card 5
View more cards

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