POLYATOMIC
What is a polyatomic ion?
Ions which consist of more than one atom
Draw the Lewis Structure for C3H8O
Can't insert an image
What bond is BHCl2
-polar covalent
-nonpolar covalent
-ionic bond
Polar covalent bond
what is the shape of PCl5
trigonal bipyramidal
What are lone pairs?
pairs of electrons that are not bonded in a molecule
Which polyatomic ion has a higher charge?
a) Chlorate
b) Sulfate
a) Chlorate
Name the shape of H2O
Bent
What is the missing word? Breaking bonds __________ energy
"requires" or "needs"
Of the following single bonds, which is the LEAST polar?
A : N—H
B: H—F
C: O—F
D: I—F
E: O—H
C: O—F
Out of C, Si, and P: which has the highest electronegativity?
C
What is ClO4-?
Perchlorate
Which of these have a trigonal-pyramidal
A. H2O
B. NH3
C. BH3
D. CH4
E. SiH4
B. NH3
Explain why molecules are polar or nonpolar.
molecules are polar when they have an electronegativity difference between the bonds...they pull unevenly. They are nonpolar when there is NOT an electronegativity difference and therefore the pull/attraction is the same.
As the number of covalent bonds between two atoms increases, the distance between the atoms ______ and the strength of the bond between them ______.
decreases; increases
A reaction that produces a gas is carried out in a sealed vessel on a balance. What happens to the mass the balance shows, as the reaction proceeds?
It does not change
Name three polyatomic ion that have a charge of -1
Possible answers:
Hydroxide, Nitrate, Chlorate, Acetate, biCarbonate
Explain what a trigonal pyramidal molecule actually looks like.
Possible answers:
a tripod
a pyramid
a tent.
Which of these species has an atom with an expanded octet? ozone(O3), triiodide ion(I3-), selenium dichloride(SeCl2), arsenic trifluoride(AsF3)
triiodide ion(I3-)
What is a dipole?
These occur when two atoms in a molecule have substantially different electronegativity: One atom attracts electrons more than another, becoming more negative, while the other atom becomes more positive. The have poles.
What is the correct explanation for why a sulfide ion has a larger radius than a sulfur atom?
Increased electron-electron repulsion in the outer shell
What is the name for (C2H3O2)-1?
Acetate
Find the bond angle present in sulfur dioxide.
120 degrees
Which of these species displays resonance? phosphorus pentachloride, phosphate ion, tetraphosporus decoxide, carbon monoxide
phosphate ion
Explain the difference between inTERmolecular forces and inTRAmolecular forces and give examples for each
inTERmolecular: between DIFFERENT molecules
ex. London dispersion force, dipole-dipole interaction, ion-dipole interaction, and van der Waals forces
inTRAmolecular: WITHIN the molecule
ex. chemical bonds such as ionic, covalent and metallic bonds
Explain the VSEPR theory.
Valence shell electron pair repulsion (VSEPR) theory is a model used, in chemistry, to predict the geometry of individual molecules from the number of electron pairs surrounding their central atoms.