Chemistry Unit 4: Covalent Bonding
hexaboron monosilicide
B6Si
What shape would H2O be?
Bent
Which of the following compounds is formed by covalent bonding? Na2S, AlCl3, C6H12O6, or LiH
C6H12O6, because they're all nonmetals
CH4 (methane)
Carbon tetrahydride
Chlorine dioxide
ClO2
molecular substance
aka a covalent, is made of nonmetals
dinitrogen trioxide
N2O3
Ammonia
NH3
Which of the following molecules contains a polar covalent bond? H2, PH3, F2, or NH3?
NH3, because the electronegativity is not 0
Phosphorus triiodide
PI3
ionic compound properties
high melting and boiling point, good conductors when melted or dissolved, hard, and brittle
SeF6
selenium hexafluoride
Delta EN of non-polar
0.0-0.4
Delta EN of polar
0.5-1.7
Delta EN of ionic
1.7-3.3
Which of the following molecules contains a non-polar covalent bond? H2O, HF, F2, or NH3
F2, because the delta electronegativity is 0
Which of the following molecules has the most polar bond? HF, HCl, HBr, or HI
HF, because fluorine has a high electronegativity
Hydrogen Monoiodide
HI
Diotomics
Hydrogen, nitrogen, fluorine, bromine, chlorine, iodine, and oxygen
Iodine pentafluoride
IF5
What shape is H — Cl ?
Linear
antimony tribromide
SbBr3
What shape would CCl4 be?
Tetrahedral
What happens when an atom of H and and atom of F bond together?
The H bond will be partially positive, while the F bond will be partially negative. The F bond will also be more electronegative than the H bond.
What shape would NH3 be?
Trigonal pyramidal
VSEPR theory
Valence Shell Electron Pair Repulsion Theory
polar covalent compound
a mix of the same properties as ionic and covalent
O2
diatomic oxygen
B2Si
diboron monosilicide
Si2Br6
disilicon hexabromide
NF3
nitrogen trifluoride
non-polar covalent compound
none of the same properties as ionic or covalent
covalent compound properties
poor conductors, low melting and boiling point, and solids are soft
SCl4
sulfur tetrachloride
P4s5
tetraphosphorus pentasulfide
how can you test if a substance is ionic or not?
try to melt it, see if it dissolves in water, test it's conductivity in, and out of water