Electron Arrangement

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  • Created by: Heather
  • Created on: 04-10-14 16:37
What is an electron?
A cloud of negative charge,
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What are the shells on atoms called?
Energy levels
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What is the formula to discover the maximum number of electrons in an energy level?
2nsquared where n is the number of the main energy level,
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What sub-level does Level 1 have and how many electrons can it hold in TOTAL?
's' and can hold 2
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What sub-levels does Level 2 have and how many electrons can it hold in TOTAL?
's' and 'p' and can hold 2 in the 's' level and 6 in the 'p' level so can hold 8 in total
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What sub-levels does Level 3 have and how many electrons can it hold in TOTAL?
's', 'p' and 'd' anc 's' can hold upto 2 electrons, 'p' sub-level can hold upto 6 electrons and the 'p' sub level can hold up to 10 with a total of 18 in Level 3,
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What sub-levels does Level 4 have and how many electrons can it hold in TOTAL?
's', 'p'. 'd' and 'f' and the 's' sub-level can hold up to 2 electrons, 'p' sub-level can hold upto 6 electrons, the 'p' sub level can hold up to 10 and the 'f' sub-level can hold up to 14 electrons with a total of 32
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What theory do we use for a more complete conscription of the elcetron and when was it developed?
Quantum mechanics in the 1920s
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What does the solution to the equation give?
the probalilty of finding an electron in a given volume of space called an atomic orbital,
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An electron fills a volume in space. What is this volume called?
Its atomic orbital,
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What probality is there of finding a volume of space with an electron?
95%
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What is the maximum number of electrons each ORBITAL hold?
2
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How many electrons can one p-oribital hold and why?
2 but p-orbitals come in groups of three orbitals to give 6 electrons in the p sub-level,
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How is an orbital represented and the electrons inside?
An orbital is represented as a box and the 2 electrons in each are two half arrows, one facing up and the other down,
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What proeprty do electrons have?
Spin so two electrons in the same orbital must have opposite spins
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What are the three rules for allocating electrons to atomic orbitals?
Lower energy orbitals are filled first and within these lower levels the lower sub-levels are filled first, -Atomic orbitals of the SAME energy fill singly first before pairing starts, -No atomic orbital can hold more than 2 electrons,
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Why do atomic orbitals of the same energy fill singly with electrons first?
As they repel one another
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Other cards in this set

Card 2

Front

What are the shells on atoms called?

Back

Energy levels

Card 3

Front

What is the formula to discover the maximum number of electrons in an energy level?

Back

Preview of the front of card 3

Card 4

Front

What sub-level does Level 1 have and how many electrons can it hold in TOTAL?

Back

Preview of the front of card 4

Card 5

Front

What sub-levels does Level 2 have and how many electrons can it hold in TOTAL?

Back

Preview of the front of card 5
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