Bonding Flashcards
Chap 3
3 types of bonding in the periodic table
Simple covalent (most)
Giant covalent (C & Si)
Giant metallic (most)
How many ionic metals are involved in metallic bonding?
1
What metal ions don’t form noble gas structures when ionic bonding?
Transition metals
Metals after transition metals
True or false: all negative ions aim to have noble gas structures
True
What determines how many electrons are transferred for cations of transition metals and the metals after transition metals (who are not trying to achieve noble gas structures)?
Ionisation energies
True or false: all non metals covalently bond to create noble gas structures
False— some are validly stable if they make the max no. Of bonds
What holds covalently bonded atoms together? (3 points)
electrostatic attraction between
pos nuclei and
neg shared electron pairs
Coordinate/Dative covalent bond
covalent bond when both shared electrons are provided by 1 atom (and the atom accepting e- must have an incomplete outer shell)
What is the “lone pair” in covalent bonding? How are they used in dative covalent bonding?
Electrons not being used in bonding
Donor atoms will use they lone pair in a dative covalent bond (so other atom doesn’t have to give any)
Types of forces between molecules that are NOT bonds
- van der Waals
- hydrogen bonds
- dipole-dipole attractions
What makes an ionic bond strong? What do these 2 things lead to?
- small ionic radius (shielding comes under this)
- big ionic charge
greater electrostatic attraction
What makes a covalent bond strong? What is the strongest kind of covalent bond?
The shorter the bond (the more electron pairs are shared) the stronger the bond
Triple bonds
What makes a metallic bond strong? (2 reasons)
Smaller atoms (minor point) and more delocalised electrons
