Unit 4 test review Flashcards
Ionic bonds
Electrons transfer between a METAL and NON METAL ex)NaCl
Covalent Bond
Electron transfer between two NON METALS ex) CO2
Do Ionic bonds conduct if so when
when it dissolves or is melted
Do Covalent bonds conduct? If so when
No, They have poor conductivity
Does Ionic bond have a low or high melting point
High
Does covalent bond have a low or high melting point
Low
What are Ionic bonds soluble in
They are soluble in water
What are covalent bonds soluble in
Soluble in non polar solvents
Large difference in electronegativity is…
An Ionic bond
Small Difference in electronegativity is…
A covalent bond
Lewis structure steps…
- Count Valence electrons
- Arrange atoms
- Draw bonds and lone pairs
- Check octet rule (Besides hydrogen and carbon)
Ionic compounds Use the cross method to balance charges
EX) Mg2 + Cl= MgCl2
what is the bond angle or a linear shape give an example
180 ex) Co2
what is the bond angle or a Bent shape give an example
120 or 109.5 degrees
Ex) So2 or H2O
what is the bond angle or a Triangle planar shape give an example
120 degrees\
Ex) Bf3
what is the bond angle or a Triangol pyramidal shape give an example
109.5 degrees
Ex) NH3
what is the bond angle or a Tetrahedral shape give an example
109.5 degrees CH4
What is the formula charge equation
Valence electrons - (nonbinding electrons) - bonding electrons/2
What are inter molecular forces
The attractions between molecules. They are weaker than the bonds within molecules but significantly affect a substances physical properties
How to find the resonance structures
- Draw Lewis structures
- look for double or triple bonds
- count all valid structures
How do you find Valence electrons on an atom and how many do you need to fill to make an octect rule
The number of which the atom group it is in - you need 8 total to make the octect rule
