Electrons Bonding and Structure Flashcards
What make up electron shells?
Sub-shells and orbitals
What is the principle quantum number?
Shell number
What do shells further from the nucleus have?
Higher energy and larger principle quantum number.
What are the first 4 sub-shells?
S P D F
What shape is an S orbital
sphere
What is an orbital?
A bit of space an electron moves in.
What energy subshell is filled up first?
The lowest
What is ionic bonsing?
An electrostatic attraction between two oppositely charge ions.
What group forms postotive 1 ions and what group forms negative 1?
group 1 and 7
When do ionic compunds conduct electrisity?
When molten or dissolved.
What are ionic compunds mp and bp?
High
What do ionic compunds do in water?
dissolve
What is a covalent bond?
strong electrostatic attraction between a shared pair of electrons and the nuclei of the bonded atoms.
What are dative covalent bonds?
When both electrons come from one atom
What does the shape of a molecule depend on?
the electron pairs around the central atom.
Why do electrons repel eachover?
As they are negatively charged
What repels more a bonded pair or a lone pair?
A bonded pair
What do you call a pair of electrons not bonded?
a lone pair
What is electronegativity?
An atom’s ability to attract an electron pair in a covalent bond
What is the most electronegative atom?
Flourine
What scale measures electronegativity?
The pauling scale
In a covalent bond between two atoms of different electronegativity where are the bonding electrons pulled towards? what does this do?
Themore electronegative atom making it polar
What is a permenant dipole?
a difference in charge causes by a shift in electron density.
Where would you find purely covalent bonds?
Between diatomic molecules
