Electron energy levels (Edexcel GCSE Physics): Flashcards
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What are energy levels (or shells)?
What are energy levels (or shells)?
Specific regions where electrons exist around the nucleus
Where electrons can exist
Where electrons can exist
Only at specific levels, not in between
Energy of levels closer to nucleus
Energy of levels closer to nucleus
Lower in energy
Energy of levels further from nucleus
Energy of levels further from nucleus
Higher in energy
What happens when an electron moves up an energy level?
What happens when an electron moves up an energy level?
Electromagnetic radiation is absorbed; electron becomes excited
Excited electron means
Excited electron means
Electron has moved to higher energy level
What happens when electron moves down energy level?
What happens when electron moves down energy level?
Energy released as electromagnetic radiation
Ionisation definition
Ionisation definition
When an atom loses an electron
Charge of ionised atom
Charge of ionised atom
Positively charged
Ionising radiation definition
Ionising radiation definition
Radiation that can knock electrons out of atoms
Examples of ionising radiation
Examples of ionising radiation
Alpha particles, beta particles, gamma rays
How are energy levels spaced further from nucleus?
How are energy levels spaced further from nucleus?
They get closer together
Greater energy difference between levels means
Greater energy difference between levels means
Higher frequency radiation emitted