Electron Structure
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What is each shell given?
A principal quantum number
How do you calculate the maximum number of electrons in a shell?
2n squared (n is the principal quantum number)
How many electrons are in the first shell?
2
How many electrons are in the second shell?
8
How many electrons are in the third shell?
18
How many electrons are in the fourth shell?
32
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
What is electron shielding?
The repulsion between electrons in different inner shells
What is a shell?
A group of atomic orbitals with the same principal quantum number
What is the principal quantum number?
A number representing the relative overall energy of each orbital which increases with distance from the nucleus
What is an atomic orbital?
A region within an atom that can hold up to 2 electrons with opposite spins
What is a sub-shell?
A group of the same type of atomic orbitals within a shell
What is electronic configuration?
The arrangement of electrons in an atom