chapter 5
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
卡片预览 (24 张)
what is a trend in energy levels?
Energy levels get closer and closer the higher the energy level is
what are atomic orbitals?
A region of space around the nucleus that can hold up to two electrons with opposite spins
What are shells made up of?
Atomic orbitals
What are the different models of orbitals?
S P D F
What is the shape of the S-orbital?
spherical
How many electrons can hold in the S-orbital?
2 electrons
What shape is the P orbital?
dumbbell shaped
How many P-orbitals are there and what position are they with each other?
3 of them at right angles
How many electrons can hold in a p-orbital?
6 electrons
How many D-orbitals are there and how many electrons can it hold?
5 of them with a max of 10 electrons
How many F-orbitals are there and how many electrons can it hold?
7 of them with a max of 14 electrons
what subshell is filled after 3P?
4S then 3D
Why do each orbital need opposite spins?
electrons are negatively charged and repel each other electrons have a property of a spin so electrons occupying the same space must have opposite spins
What is ionic bonding?
The strong electrostatic attraction between positive and negative charged ions
what is the structure of a giant ionic lattice?
Oppositely charged ions in all directions attracted strongly closely packed in a regular Lattice arrangement
what are the melting and boiling points in a ionic compound?
solid at RT and have high melting and boiling points because there is insufficient energy required to overcome strong ionic bonds
how does the strength of the ionic bond increase?
It increases when the charge of the ionic bond is high
Are ionic compound soluble?
Yes many ionic substances dissolve in polar molecules
Why can’t ionic compounds conduct electricity when solid?
Ions are held in fixed position in ionic lattice, so there are no mobile charges and so it does not conduct electricity
why can ionic compounds conduct electricity when liquid?
Ions are free to move so there are mobile charges and can conduct electricity
what is a molecule?
a group of atoms covalently bonded together
what is covalent bonding?
The strong electrostatic attraction between a shared pair of electrons and the nuclei of the bonded atoms
Is the covalent bond localised?
the electrostatic attraction is localised and is solely between the shared pair of electrons in the covalent bond
What is a lone pair?
Pair of electron not involved in bonding