Flashcards in Electronic Structure Deck (124)
What is the number given to each shell called?
Principal quantum number
What can be said about the energy and principal quantum number when a shell gets further away from the nucleus?
The higher it's energy and the larger it's principal quantum number is
What are shells divided into?
What are the 4 types of sub-shell?
What is an orbital?
A region of a sub-shell that contains a maximum of 2 electrons with opposite spins
What is spin?
A type of momentum possessed by an electron which can either be up or down
How many electrons can s sub-shells hold?
How many electrons can p sub-shells hold?
How many electrons can d sub-shells hold?
How many electrons can f sub-shells hold?
What can be said about the energy of orbitals in the same sub-shell?
They have the same energy
What is spin-pairing?
When there are 2 electrons in an orbital which spin in opposite directions
What shape are s-orbitals?
What shape are p-orbitals?
What is the formula for the number of electrons a shell can hold?
2n^2 (n being shell number)
What is electron configuration?
The number of electrons and how they're arranged
Why do 4s sub-shells fill first before 3d sub-shells?
4s sub-shells have a lower energy level
What did Werner Heisenberg came up with?
The theory that you cannot know the speed of an electron or it's exact position
What was Heisenberg's theory called?
How do ions form?
When atoms lose or gain electrons to become positively or negatively charged
What is electrostatic attraction?
A strong force between positive and negative ions
What is an ionic bond?
An electrostatic attraction between 2 oppositely charged ions
What is an ionic compound?
When oppositely charged ions form an ionic bond
What are ionic crystals?
Giant lattice (regular structure) of ions
How does a lattice form?
When each ion is electrostatically attracted in all directions to ions of the opposite charge
Describe the electrical conductivity of ionic compounds
Conduct electricity when molten or dissolved, but not when solid
Why do ionic compounds not conduct electricity when solid?
There are no mobile ions as they're fixed in position by strong metallic bonds
Why do ionic compounds conduct electricity when molten or dissolved?
They have ions that are free to move (mobile ions) so can carry charge
Describe the melting and boiling points of ionic compounds?
Have high melting and boiling points