Flashcards
C2 topic 1: electron shells
Cards in this deck (6)
- 1Where do you find electrons?In the shells around the nucleus
- 2Where are electrons filled from first?The lowest energy levels are filled first. (closest to the nucleus)
- 3How many electrons are allowed in each shell?The first shell=2
Second shell=8
Third shell=8
(thats all you need to know)
2:8:8 rule - 4What happens if the outer shell isn't full?The atom reacts
- 5If nitrogen has 7 protons whats it's electronic configuration?If it has 7 protons it must have 7 electrons.
The electronic configuration must be 2:5 - 6Argon has 18 protons, what is its electronic configeration?2:8:8
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- Description
- This is just all thats needed to know about electron shells.-edexcel
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- paigeysonghurst
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