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OCR Chemistry A Level 2015 > Electron Structure > Flashcards

Flashcards in Electron Structure Deck (13)
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1

What is each shell given?

A principal quantum number

2

How do you calculate the maximum number of electrons in a shell?

2n squared (n is the principal quantum number)

3

How many electrons are in the first shell?

2

4

How many electrons are in the second shell?

8

5

How many electrons are in the third shell?

18

6

How many electrons are in the fourth shell?

32

7

What is the first ionisation energy?

The energy required to remove one electron from each atom in one mole of gaseous atoms to form one mole of gaseous 1+ ions

8

What is electron shielding?

The repulsion between electrons in different inner shells

9

What is a shell?

A group of atomic orbitals with the same principal quantum number

10

What is the principal quantum number?

A number representing the relative overall energy of each orbital which increases with distance from the nucleus

11

What is an atomic orbital?

A region within an atom that can hold up to 2 electrons with opposite spins

12

What is a sub-shell?

A group of the same type of atomic orbitals within a shell

13

What is electronic configuration?

The arrangement of electrons in an atom